Any of those help with cold weather shifting?
1 - 20 of 27 Posts
(to jboogie)
if you run straight redline mtl, you MAY experience problems. it is too thin for the specs on your manual tranny. mt -90 would be the choice as far as viscosity is concerned. it is a 90 wt lube .(or you could try a blend of the two, but read up on that in detail first)
your manual tranny calls for a 75-90 wt lube .(but you probably knew that)
(to scott aw)
I have tried conventional gear oil, redline and amsoil. I have had the best luck with redline so far, it has improved shift quality in all seasons. but for me it looks like nothing will totally fix the clunky notchy shifting i experience, more so in cold weather.
good luck and hope either one you choose works for you.
if you run straight redline mtl, you MAY experience problems. it is too thin for the specs on your manual tranny. mt -90 would be the choice as far as viscosity is concerned. it is a 90 wt lube .(or you could try a blend of the two, but read up on that in detail first)
your manual tranny calls for a 75-90 wt lube .(but you probably knew that)
(to scott aw)
I have tried conventional gear oil, redline and amsoil. I have had the best luck with redline so far, it has improved shift quality in all seasons. but for me it looks like nothing will totally fix the clunky notchy shifting i experience, more so in cold weather.
good luck and hope either one you choose works for you.
some great info in here.
Since my transmission blew its reverse gear at 17k miles, I've noticed that the warranty replacement has been VERY stiff when cold. I live in Texas, so cold == above freezing.
Once the trans warms up, it shifts smooth and easy, but until then 1st and 2nd are damn near impossible to select.
I would expect this from a brand new transmission, but I've put about 1400 miles on it since it was replaced, and it still does this.
It actually snowed (real snow, not sleet) last night, and this morning it was damn near impossible to get into gear after backing out of the driveway.
It's so tight that if I'm sitting on flat, start the engine w/ the parking brake released, leave the trans in neutral and release the clutch, the vehicle starts crawling forward and a noticeable drag is placed on the engine... that lasts about the first 6-8 seconds the truck is running, and then there's a noticeable "release" if I push the clutch in for another minute or so. After I can get it in gear and get going, it will finally slot 1st and 2nd with no issue after about 3 miles of driving.
As such, I figure it's probably wearing down some tight parts and putting lots of metal in the oil, so I will likely change the fluid in another 1000 miles or so...
I'm a big fan of RedLine, (I run it in just about everything, though I use Mobil 1 in the Taco engine because I can find it in gallon jugs easier than I can find RL in quarts) so I'd probably want to dig up some RedLine synth for the transmission.
Since my transmission blew its reverse gear at 17k miles, I've noticed that the warranty replacement has been VERY stiff when cold. I live in Texas, so cold == above freezing.
Once the trans warms up, it shifts smooth and easy, but until then 1st and 2nd are damn near impossible to select.
I would expect this from a brand new transmission, but I've put about 1400 miles on it since it was replaced, and it still does this.
It actually snowed (real snow, not sleet) last night, and this morning it was damn near impossible to get into gear after backing out of the driveway.
It's so tight that if I'm sitting on flat, start the engine w/ the parking brake released, leave the trans in neutral and release the clutch, the vehicle starts crawling forward and a noticeable drag is placed on the engine... that lasts about the first 6-8 seconds the truck is running, and then there's a noticeable "release" if I push the clutch in for another minute or so. After I can get it in gear and get going, it will finally slot 1st and 2nd with no issue after about 3 miles of driving.
As such, I figure it's probably wearing down some tight parts and putting lots of metal in the oil, so I will likely change the fluid in another 1000 miles or so...
I'm a big fan of RedLine, (I run it in just about everything, though I use Mobil 1 in the Taco engine because I can find it in gallon jugs easier than I can find RL in quarts) so I'd probably want to dig up some RedLine synth for the transmission.
Hopefully I can clear a few things up here...
Hope this helps.
Synchromax is for transmissions that use a light weight oil. It is essentialy the viscosity of ATF, very thin. You should not use this in a transmission calling for 75W-90 gear oil.
Redline MTL is gear oil, same as MT-90. It is a thinner 70W-80 GL-4 fluid. MT-90 is 75W-90 GL-4. If you were smelling gear oil with MT-90 and not MTL, then it must have been overfilled at one point.
Normal 75W-90 gear oil can be used in the tranny (as manual allows GL-5), but with the LSD additives usually included in off-the-shelf gear oils, it is usually too slippery for optimum shifting.Quote:
Originally Posted by sechsgang
Demoncleaner, what did you use for the rest? 75W-90 all around?
Yep, same stuff in tranny, transfer, & front diff.
I had the same problem with a new manual trans replaced by the dealer. The problem was, the dealer filled the replacement tranny with bulk 80W-90 gear oil (I asked). As soon as I put MT-90 in, cold shifting was back to normal.Since my transmission blew its reverse gear at 17k miles, I've noticed that the warranty replacement has been VERY stiff when cold. I live in Texas, so cold == above freezing.
Once the trans warms up, it shifts smooth and easy, but until then 1st and 2nd are damn near impossible to select.
I would expect this from a brand new transmission, but I've put about 1400 miles on it since it was replaced, and it still does this.
Hope this helps.
1 - 20 of 27 Posts
