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Question By: Shahram on Aug 30 2020 6:09 PM
Most likely a T86 in that set up. It will be stamped on the side of the case. Please email mike@kaiserwillys.com to help out.
Answer By: Willys Jeep Parts Tech on Aug 31 2020 5:46 AM

Question By: Jeff on Jul 29 2020 1:45 AM
Straight GL-4 non synthetic (80/90 weight gear oil) its good for yellow metals.
Answer By: Willys Jeep Parts Tech on Jul 29 2020 5:46 AM

Question By: Sandy on Mar 8 2018 12:29 AM
There is only one sychronizer in the T90 between 2nd and 3rd.
Answer By: Willys Jeep Parts Tech on Mar 8 2018 6:06 AM

Question By: PAT kENNEDY on Nov 6 2017 12:19 AM
Sorry, the T90 will not do this. Youll need to come to a complete stop when shifting from 2nd to 1st.
Answer By: Willys Jeep Parts Tech on Nov 6 2017 5:45 AM

Question By: David Jones on Aug 13 2017 1:29 PM
There are a few directions to go on this. Please give us a call toll free and we can go over what to check. 888.648.4923. Thanks
Answer By: jdgranberg@gmail.com on Aug 14 2017 6:23 AM

Question By: Anonymous on Mar 3 2015 12:00 AM
They typically used the T86AA, T14 or T90 transmissions.
Answer By: Willys Tech on Mar 4 2015 12:00 AM

Question By: GORDON on Mar 3 2015 12:00 AM
If you have the T90 transmission in there the synchronizer is a good place to start. I would also check out your poppet balls and springs.
Answer By: Willys Tech on Mar 4 2015 12:00 AM

Question By: Henry on Sep 16 2014 12:00 AM
I would inspect your sycronizer closer. I would also look at any excessive wear and make sure any needle bearings havent dropped.
Answer By: Willys Tech on Sep 16 2014 12:00 AM

Question By: steve on Aug 19 2014 12:00 AM
Sounds like your schronizer is very badley worn and your brass blocking ring is done.
Answer By: Willys Tech on Aug 19 2014 12:00 AM

Question By: Anonymous on Aug 10 2014 12:00 AM
The sycronizer may be the problem but you may need to check your poppet balls and springs.
Answer By: Willys Tech on Aug 11 2014 12:00 AM

Question By: Anonymous on Mar 23 2014 12:00 AM
Sounds like its your syncronizer if it wont shift. I would take it apart and check for damage.
Answer By: Willys Tech on Mar 24 2014 12:00 AM

Question By: chris on Mar 17 2014 12:00 AM
We have a T90BSG kit as well as they syncronizer assembly or just the brass rings if you need them. Call us toll free. We are more than happy to help out.
Answer By: Willys Tech on Mar 17 2014 12:00 AM

Question By: rodney on Mar 16 2014 12:00 AM
We do sell mechanics manual that will walk you thru the process.
Answer By: Willys Tech on Mar 17 2014 12:00 AM

Question By: Luke on Sep 28 2013 12:00 AM
Your 1st and 2nd speed gear are not syncronized. You have to come to a complete stop when shifting from 2nd to 1st or you will grind gears.
Answer By: Willys Tech on Sep 30 2013 12:00 AM

Question By: Dave Wilson on Jul 29 2013 12:00 AM
Somebody put an unoriginal engine in there so you may want to check the transmission as well. It will be stamped on the drivers side case. As long as you have a T-90 they should be the same for either.
Answer By: Willys Tech on Jul 30 2013 12:00 AM

Question By: Joe on Feb 27 2013 12:00 AM
In 1966 it was optional to have a T90 or T86AA. It will be stamped right on the side of the transmission in the housing.
Answer By: Willys Tech on Feb 27 2013 12:00 AM

Question By: Anonymous on Jan 12 2013 12:00 AM
Not the motor no. You can just drop the transmission down to get to it.
Answer By: Willys Tech on Jan 14 2013 12:00 AM

Question By: Csmeron on Sep 29 2012 12:00 AM
This should probably do the trick. I would check for any excessive wear on the gears themselves too.
Answer By: Willys Tech on Oct 1 2012 12:00 AM

Question By: Harry on Jun 13 2012 12:00 AM
The brass wears over time. Really any transmisison that is that old will have alot of wear. Also the springs, shift plates ect take wear.
Answer By: Willys Tech on Jun 14 2012 12:00 AM

Question By: jeep freak on Feb 21 2012 12:00 AM
Its your syncronizer. This should take care of it for you.
Answer By: Willys Tech on Feb 21 2012 12:00 AM

Question By: Marty on Jul 2 2011 12:00 AM
The T90 is not sync'd between 2nd to 1st. You always have to come to a complete stop. This is the syncronizer between 2nd and 3rd.
Answer By: Willys Tech on Jul 5 2011 12:00 AM

Question By: Brad on Jun 23 2011 12:00 AM
This should solve your problem.
Answer By: Willys Tech on Jun 23 2011 12:00 AM