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NP435 shifting
Post Fiend
Joined: Sep 2000
Posts: 8,238
Likes: 3
From: Oregon
Originally Posted by fishmanndotcom
arent' they exactly the same aside from the name?
Its Comin Right for us!
Joined: Feb 2005
Posts: 12,198
Likes: 2,657
From: GA
1st gear on the t-18's is 6.3 somthing vs the 435' 6.69
2nd gear is closer to 3.0:1 i think its 3.09?? 435 is 3.34?
3rd gears are slightly different as well
t-18 has cast iron top, 435 has aluminum top, the t-18 has a threaded cap that screws onto the top which holds the shifter in, the 435 has a spring loaded stamped cap thingy..
internally they are pretty much identical
2nd gear is closer to 3.0:1 i think its 3.09?? 435 is 3.34?
3rd gears are slightly different as well
t-18 has cast iron top, 435 has aluminum top, the t-18 has a threaded cap that screws onto the top which holds the shifter in, the 435 has a spring loaded stamped cap thingy..
internally they are pretty much identical
Senior User
Joined: Nov 2004
Posts: 240
Likes: 0
From: Appleton, WI
my 435 down shifts pretty good from 4 to 3. if i'm going 55 and want to blow the doors off someone i can put it right in to 3rd. and for the shifter handles some of the newer ones have a end that is seperate from the rest of the handle, its held on with a pin. very sloppy. I just put an older shift handle in that was one solid peice it made it alot better
Senior User
Joined: Mar 2005
Posts: 297
Likes: 1
well, I'll just say that .. well.. learn how to double clutch. Mine sucks too and is getting worse. I was thinking of replacing or rebuilding it but learning how to double clutch to 1st while moving has taught me that you can do pretty much anything with these trannies if you know your rpms.
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Thread Starter
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Posting Guru
Joined: Feb 2002
Posts: 1,003
Likes: 0
Double clutching doesn't change my problem, it's just as hard shifting from 4th to 3ed with anything more than about 25 mph. Accuracy as mentioned is a factor and I am adapting to where the sweet spot is. But when it does go in it's not clean. I can feel it hit a tooth like it's going to grind, but just one impact and then it goes in. I'm pretty sure that synchro is worn out but I can live without it for a while. I really want to see how the one I rebuilt drives for comparison, hopefully it won't be too long before I have the money to get it in the other truck.
Junior User
Joined: Mar 2004
Posts: 90
Likes: 1
From: Stockbridge Michigan
my truck goes from 4-3 pretty decent but when i'm coasting to a stop and want to put it in 2nd to take off it won't go in and you have to wait till your fully stopped and you have to mess with it like putting it in 4th or reverese then trying 2nd and it will usually go in. I can hear the synchos whining allittle bit while i'm doing this, does this mean the synchros are going out?
Thread Starter
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Posting Guru
Joined: Feb 2002
Posts: 1,003
Likes: 0
Yep I think that your 2-3 synchro is either worn out or broken. I can always shift easily into second, if I'm going too fast it won't go in until I slow down to 25 mph or so then it gently slides in without grinding.
Its Comin Right for us!
Joined: Feb 2005
Posts: 12,198
Likes: 2,657
From: GA
i wonder if some of these problems are from the new gl-5 gear oil, supposedly the syncros in these trannies DO NOT like it. my 435 rebuild instructions said to run a gl4 and not gl5, but i cant find gl4 anywhere?
