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#11
March 28th 04, 09:09 AM
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You can buy Redline's MTL or MT-90 GL-3 gear lube at www.summitracing.com/
or www.redlineoil.com/ Summit Racing is a bit cheaper. GL-3 (or any gear lube) is compatible with ATF so no worries about the tiny amount of residual ATF inside your transmission after you've drained it.  Jerry -- Jerry Bransford To email, remove 'me' from my email address N6TAY, PP-ASEL See the Geezer Jeep at http://members.cox.net/jerrypb/ > wrote in message news  > Jerry, > > As always, I appreciate your advice. > > I've learned to trust what you say for quite a while. > > Although I haven't been specifically looking for it, I don't remember > seeing either Redline or GL-3 gear lube in local auto parts stores. > Do you have any suggestions as to who might carry this? > > And, importantly, if I decide to switch now (from the Mobil1 ATF to > GL-3), can I just go ahead and put the gear lube into the transmission > with what remains of the ATF. (As I'm sure you know, the fill/drain > hole is 1/2 way up the tranny case. I siphoned out what I could this > evening but I'm sure it is not completely empty.) > > Can I add GL-3, run it for a while (days or weeks or whatever) and > then do several more cycles like this until the ATF has been replaced > by the GL-3?? > > Mike > > On Sat, 27 Mar 2004 18:04:22 -0800, "Jerry Bransford" > > wrote: > > >While ATF was in fact the recommended choice for some manual transmissions > >for several years, ATF is no longer recommended by those manufacturers, even > >if it was at one time. It was later discovered that ATF does not have > >sufficient shear-strength to protect the gears, only a true gear lube does. > >Some manuals, like Chilton's, still erroneously recommend ATF because they > >are based on manuals from the era when ATF was still being recommended. > >They tried to switch to ATF in their desire to standardize on one lubricant > >suitable for both autos and manual trannies, but the experiment failed when > >they figured out ATF was not protecting manual transmission gears > >sufficiently. > > > >Use a GL-3 or GL-3 gear lube with a suggested viscosity of 75W-90. Gear > >lubes like Mobil-1's 75W-90 or 70W-90 are GL-5 which are not recommended for > >a manual tranny, they are only suitable for differentials. Any GL-5 should > >be avoided as it is harmful over the long-term to the soft yellow metals > >like brass used to make gear synchronizers, though damage won't happen in > >the short term. Redline's MTL is a good GL-3 gear lube that has a viscosity > >of 70W-80, or if you wheel in warmer conditions, Redline's MT-90 has a > >slightly higher 75W-90 viscosity. > > > >Jerry > > Michael Pomeroy 
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#13
March 28th 04, 09:11 AM
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"Joseph Myers" > wrote in message
... > I've used mobil 1 in all 4 of my Jeeps 55,74,84, & 85, sence it has > been on the market, never had a problem. It has more shear strength > than any thing else. But your synchros would be happier if you didn't use Mobil-1 since Mobil-1 is a GL-5 gear lube and most GL-5 gear lubes, including Mobil-1's, are harsh on the metals used to make the the synchronizers. A GL-3 or GL-4 is much better for your synchros and transmission. Mobil-1's gear lube is GL-5 because it's intended for hypoid-cut gears like are used inside differentials. Jerry -- Jerry Bransford To email, remove 'me' from my email address N6TAY, PP-ASEL See the Geezer Jeep at http://members.cox.net/jerrypb/ > > Joe > > On Sat, 27 Mar 2004 23:11:33 GMT, wrote: > > >1982 Jeep CJ8 -- 6 cylinder, 4 speed > > > >Transmission shifts and works well. > > > >What should I be using as lubricant in the transmission? > > > >The shop manual refer's me to a "Special Lubricant" (which is no > >longer available). And there are references to using automatic > >transmission fluid (ATF). > > > >The Jeep dealer, when asked the question, has given me differing > >answers depending upon who I happen to talk to. > > > >It has most recently had Mobil 1 synthetic gear lube or Mobil 1 > >synthetic ATF -- I'm not certain which. > > > >So what should I use:?? > >-- gear lube? > >-- ATF? > >-- some other magical lubricant? > > > >(And if the synthetic in there now wasn't the correct choice some > >time ago, what do I need to do -- if anything -- to flush prior to > >getting the proper stuff in there??) > > > >Advice, please -- and thanks as always for the help ..... > > > >Mike > >Michael Pomeroy >
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#14
March 28th 04, 09:29 AM
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I've used mobil 1 in all 4 of my Jeeps 55,74,84, & 85, sence it has
been on the market, never had a problem. It has more shear strength than any thing else. Joe On Sat, 27 Mar 2004 23:11:33 GMT, wrote: >1982 Jeep CJ8 -- 6 cylinder, 4 speed > >Transmission shifts and works well. > >What should I be using as lubricant in the transmission? > >The shop manual refer's me to a "Special Lubricant" (which is no >longer available). And there are references to using automatic >transmission fluid (ATF). > >The Jeep dealer, when asked the question, has given me differing >answers depending upon who I happen to talk to. > >It has most recently had Mobil 1 synthetic gear lube or Mobil 1 >synthetic ATF -- I'm not certain which. > >So what should I use:?? >-- gear lube? >-- ATF? >-- some other magical lubricant? > >(And if the synthetic in there now wasn't the correct choice some >time ago, what do I need to do -- if anything -- to flush prior to >getting the proper stuff in there??) > >Advice, please -- and thanks as always for the help ..... > >Mike >Michael Pomeroy
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#15
March 28th 04, 09:29 AM
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I've used mobil 1 in all 4 of my Jeeps 55,74,84, & 85, sence it has
been on the market, never had a problem. It has more shear strength than any thing else. Joe On Sat, 27 Mar 2004 23:11:33 GMT, wrote: >1982 Jeep CJ8 -- 6 cylinder, 4 speed > >Transmission shifts and works well. > >What should I be using as lubricant in the transmission? > >The shop manual refer's me to a "Special Lubricant" (which is no >longer available). And there are references to using automatic >transmission fluid (ATF). > >The Jeep dealer, when asked the question, has given me differing >answers depending upon who I happen to talk to. > >It has most recently had Mobil 1 synthetic gear lube or Mobil 1 >synthetic ATF -- I'm not certain which. > >So what should I use:?? >-- gear lube? >-- ATF? >-- some other magical lubricant? > >(And if the synthetic in there now wasn't the correct choice some >time ago, what do I need to do -- if anything -- to flush prior to >getting the proper stuff in there??) > >Advice, please -- and thanks as always for the help ..... > >Mike >Michael Pomeroy
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#16
March 28th 04, 02:25 PM
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Just one comment, you will not find a 'GL-3' only lube anywhere but at
the dealer for about $17 a quart. They sell it for the AX-15's which require a GL-3 ONLY lube. That said I have been running Mobil-1 75/90 in my 98XJ's 5 speed for the last 160,000+ miles. I changed mainly because the stock oil was just too cold in the winter and it took forever to be able to shift into second, the mobil solved that problem. A lube that is listed as GL-2, GL-3, GL-4, GL-5 is not GL-3, the GL-3 spec calls for 0 sulphur content, all the other GL's require sulphur so unles it is some kind of a smart oil can that recognizes GL-3 trannies and witholds the sulphur the lable is a deceptive label. All the Asins I've run across in other cars and trucks require GL-3 also... I don't think you can really hurt anything buy using Mobil-1, the only thing that I've run into that did not like it was my 20yo wheel horse lawn tractor, but boy it sure did clean it out some... wrote in news
> Jerry, > > As always, I appreciate your advice. > > I've learned to trust what you say for quite a while. > > Although I haven't been specifically looking for it, I don't remember > seeing either Redline or GL-3 gear lube in local auto parts stores. > Do you have any suggestions as to who might carry this? > > And, importantly, if I decide to switch now (from the Mobil1 ATF to > GL-3), can I just go ahead and put the gear lube into the transmission > with what remains of the ATF. (As I'm sure you know, the fill/drain > hole is 1/2 way up the tranny case. I siphoned out what I could this > evening but I'm sure it is not completely empty.) > > Can I add GL-3, run it for a while (days or weeks or whatever) and > then do several more cycles like this until the ATF has been replaced > by the GL-3?? > > Mike > > On Sat, 27 Mar 2004 18:04:22 -0800, "Jerry Bransford" > > wrote: > >>While ATF was in fact the recommended choice for some manual >>transmissions for several years, ATF is no longer recommended by those >>manufacturers, even if it was at one time. It was later discovered >>that ATF does not have sufficient shear-strength to protect the gears, >>only a true gear lube does. Some manuals, like Chilton's, still >>erroneously recommend ATF because they are based on manuals from the >>era when ATF was still being recommended. They tried to switch to ATF >>in their desire to standardize on one lubricant suitable for both >>autos and manual trannies, but the experiment failed when they figured >>out ATF was not protecting manual transmission gears sufficiently. >> >>Use a GL-3 or GL-3 gear lube with a suggested viscosity of 75W-90. >>Gear lubes like Mobil-1's 75W-90 or 70W-90 are GL-5 which are not >>recommended for a manual tranny, they are only suitable for >>differentials. Any GL-5 should be avoided as it is harmful over the >>long-term to the soft yellow metals like brass used to make gear >>synchronizers, though damage won't happen in the short term. >>Redline's MTL is a good GL-3 gear lube that has a viscosity of 70W-80, >>or if you wheel in warmer conditions, Redline's MT-90 has a slightly >>higher 75W-90 viscosity. >> >>Jerry > > Michael Pomeroy >
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#17
March 28th 04, 02:25 PM
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Just one comment, you will not find a 'GL-3' only lube anywhere but at
the dealer for about $17 a quart. They sell it for the AX-15's which require a GL-3 ONLY lube. That said I have been running Mobil-1 75/90 in my 98XJ's 5 speed for the last 160,000+ miles. I changed mainly because the stock oil was just too cold in the winter and it took forever to be able to shift into second, the mobil solved that problem. A lube that is listed as GL-2, GL-3, GL-4, GL-5 is not GL-3, the GL-3 spec calls for 0 sulphur content, all the other GL's require sulphur so unles it is some kind of a smart oil can that recognizes GL-3 trannies and witholds the sulphur the lable is a deceptive label. All the Asins I've run across in other cars and trucks require GL-3 also... I don't think you can really hurt anything buy using Mobil-1, the only thing that I've run into that did not like it was my 20yo wheel horse lawn tractor, but boy it sure did clean it out some... wrote in news
> Jerry, > > As always, I appreciate your advice. > > I've learned to trust what you say for quite a while. > > Although I haven't been specifically looking for it, I don't remember > seeing either Redline or GL-3 gear lube in local auto parts stores. > Do you have any suggestions as to who might carry this? > > And, importantly, if I decide to switch now (from the Mobil1 ATF to > GL-3), can I just go ahead and put the gear lube into the transmission > with what remains of the ATF. (As I'm sure you know, the fill/drain > hole is 1/2 way up the tranny case. I siphoned out what I could this > evening but I'm sure it is not completely empty.) > > Can I add GL-3, run it for a while (days or weeks or whatever) and > then do several more cycles like this until the ATF has been replaced > by the GL-3?? > > Mike > > On Sat, 27 Mar 2004 18:04:22 -0800, "Jerry Bransford" > > wrote: > >>While ATF was in fact the recommended choice for some manual >>transmissions for several years, ATF is no longer recommended by those >>manufacturers, even if it was at one time. It was later discovered >>that ATF does not have sufficient shear-strength to protect the gears, >>only a true gear lube does. Some manuals, like Chilton's, still >>erroneously recommend ATF because they are based on manuals from the >>era when ATF was still being recommended. They tried to switch to ATF >>in their desire to standardize on one lubricant suitable for both >>autos and manual trannies, but the experiment failed when they figured >>out ATF was not protecting manual transmission gears sufficiently. >> >>Use a GL-3 or GL-3 gear lube with a suggested viscosity of 75W-90. >>Gear lubes like Mobil-1's 75W-90 or 70W-90 are GL-5 which are not >>recommended for a manual tranny, they are only suitable for >>differentials. Any GL-5 should be avoided as it is harmful over the >>long-term to the soft yellow metals like brass used to make gear >>synchronizers, though damage won't happen in the short term. >>Redline's MTL is a good GL-3 gear lube that has a viscosity of 70W-80, >>or if you wheel in warmer conditions, Redline's MT-90 has a slightly >>higher 75W-90 viscosity. >> >>Jerry > > Michael Pomeroy >
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#18
March 28th 04, 03:03 PM
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First look closely at the bottom center of the tranny. You will find
the drain plug there. The fill plug is only for filling unless you really like the taste of old gear oil..... Any left isn't an issue then, they are ok to mix a bit, I asked my local Jeep dealer about it. The commented I could run ATF, but only to do it in the real cold 'if' I have trouble shifting. I don't so I didn't. I am in Canada and I couldn't find any regular gear oil without the 'safe for limited slip' moniker on it. This stuff will not work for long. My syncros went nuts with it. So I ended up buying a semi-synthetic that didn't mention limited slips. As Jerry mentioned , some did call for ATF, but by 85 they realized it didn't work so they went back to calling for gear oil in the 85 and 86 owners manuals. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's wrote: > > Jerry, > > As always, I appreciate your advice. > > I've learned to trust what you say for quite a while. > > Although I haven't been specifically looking for it, I don't remember > seeing either Redline or GL-3 gear lube in local auto parts stores. > Do you have any suggestions as to who might carry this? > > And, importantly, if I decide to switch now (from the Mobil1 ATF to > GL-3), can I just go ahead and put the gear lube into the transmission > with what remains of the ATF. (As I'm sure you know, the fill/drain > hole is 1/2 way up the tranny case. I siphoned out what I could this > evening but I'm sure it is not completely empty.) > > Can I add GL-3, run it for a while (days or weeks or whatever) and > then do several more cycles like this until the ATF has been replaced > by the GL-3?? > > Mike > > On Sat, 27 Mar 2004 18:04:22 -0800, "Jerry Bransford" > > wrote: > > >While ATF was in fact the recommended choice for some manual transmissions > >for several years, ATF is no longer recommended by those manufacturers, even > >if it was at one time. It was later discovered that ATF does not have > >sufficient shear-strength to protect the gears, only a true gear lube does. > >Some manuals, like Chilton's, still erroneously recommend ATF because they > >are based on manuals from the era when ATF was still being recommended. > >They tried to switch to ATF in their desire to standardize on one lubricant > >suitable for both autos and manual trannies, but the experiment failed when > >they figured out ATF was not protecting manual transmission gears > >sufficiently. > > > >Use a GL-3 or GL-3 gear lube with a suggested viscosity of 75W-90. Gear > >lubes like Mobil-1's 75W-90 or 70W-90 are GL-5 which are not recommended for > >a manual tranny, they are only suitable for differentials. Any GL-5 should > >be avoided as it is harmful over the long-term to the soft yellow metals > >like brass used to make gear synchronizers, though damage won't happen in > >the short term. Redline's MTL is a good GL-3 gear lube that has a viscosity > >of 70W-80, or if you wheel in warmer conditions, Redline's MT-90 has a > >slightly higher 75W-90 viscosity. > > > >Jerry > > Michael Pomeroy
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#19
March 28th 04, 03:03 PM
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First look closely at the bottom center of the tranny. You will find
the drain plug there. The fill plug is only for filling unless you really like the taste of old gear oil..... Any left isn't an issue then, they are ok to mix a bit, I asked my local Jeep dealer about it. The commented I could run ATF, but only to do it in the real cold 'if' I have trouble shifting. I don't so I didn't. I am in Canada and I couldn't find any regular gear oil without the 'safe for limited slip' moniker on it. This stuff will not work for long. My syncros went nuts with it. So I ended up buying a semi-synthetic that didn't mention limited slips. As Jerry mentioned , some did call for ATF, but by 85 they realized it didn't work so they went back to calling for gear oil in the 85 and 86 owners manuals. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's wrote: > > Jerry, > > As always, I appreciate your advice. > > I've learned to trust what you say for quite a while. > > Although I haven't been specifically looking for it, I don't remember > seeing either Redline or GL-3 gear lube in local auto parts stores. > Do you have any suggestions as to who might carry this? > > And, importantly, if I decide to switch now (from the Mobil1 ATF to > GL-3), can I just go ahead and put the gear lube into the transmission > with what remains of the ATF. (As I'm sure you know, the fill/drain > hole is 1/2 way up the tranny case. I siphoned out what I could this > evening but I'm sure it is not completely empty.) > > Can I add GL-3, run it for a while (days or weeks or whatever) and > then do several more cycles like this until the ATF has been replaced > by the GL-3?? > > Mike > > On Sat, 27 Mar 2004 18:04:22 -0800, "Jerry Bransford" > > wrote: > > >While ATF was in fact the recommended choice for some manual transmissions > >for several years, ATF is no longer recommended by those manufacturers, even > >if it was at one time. It was later discovered that ATF does not have > >sufficient shear-strength to protect the gears, only a true gear lube does. > >Some manuals, like Chilton's, still erroneously recommend ATF because they > >are based on manuals from the era when ATF was still being recommended. > >They tried to switch to ATF in their desire to standardize on one lubricant > >suitable for both autos and manual trannies, but the experiment failed when > >they figured out ATF was not protecting manual transmission gears > >sufficiently. > > > >Use a GL-3 or GL-3 gear lube with a suggested viscosity of 75W-90. Gear > >lubes like Mobil-1's 75W-90 or 70W-90 are GL-5 which are not recommended for > >a manual tranny, they are only suitable for differentials. Any GL-5 should > >be avoided as it is harmful over the long-term to the soft yellow metals > >like brass used to make gear synchronizers, though damage won't happen in > >the short term. Redline's MTL is a good GL-3 gear lube that has a viscosity > >of 70W-80, or if you wheel in warmer conditions, Redline's MT-90 has a > >slightly higher 75W-90 viscosity. > > > >Jerry > > Michael Pomeroy
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#20
March 29th 04, 12:11 AM
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