T-18 vs np435
Junior User
Joined: Dec 2005
Posts: 69
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Originally Posted by lisagoud
dlbenton,
Can the NP435 be used in place of the T-18 on jeeps with the same bellhousing but different clutch set-up?
Can the NP435 be used in place of the T-18 on jeeps with the same bellhousing but different clutch set-up?
The Ford transmission will bolt up to a Jeep bellhousing that was used from '76 thru '86 with the T-18 transmission, just need a different pilot bushing.
Elder User
Joined: Oct 2009
Posts: 933
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From: Lawrenceville, Ga
t-18 vs np435
np435 is stronger, and lower geared, shifts better. But...ive never seen a t-18 come up short from a 435 either. they are both VERY strong, and my t-18 shifts really well in my 86.
they made a 435 and t-18 for a long time.
if you are searching for one, look at the door codes A means NP435 and F means t-18.
a t-18 is what im putting behind my 460, but thats just my oppinion.
np435 is stronger, and lower geared, shifts better. But...ive never seen a t-18 come up short from a 435 either. they are both VERY strong, and my t-18 shifts really well in my 86.
they made a 435 and t-18 for a long time.
if you are searching for one, look at the door codes A means NP435 and F means t-18.
a t-18 is what im putting behind my 460, but thats just my oppinion.
Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
If the noise goes away in fourth, that is a bad countershaft bearing.
Posting Guru
Joined: Jun 2009
Posts: 1,174
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Does anybody know what's going on with my NP435 when once in a while it shifts hard from 3rd to 4th? And it only whines in 1st. But either than that I like the transmission, nice low gearing overall for towing/hauling, and granny 1st for stump pulling.
Senior User
Joined: Dec 2006
Posts: 130
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From: Panama Illinois
Just kind of curious is that hard to fix.
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Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
It takes some expertise. If you have not overhauled a manual transmission before, just take it out and have someone do it for you.
The countershaft is under the mainshaft and all the gears so the whole thing has to come apart.
The countershaft is under the mainshaft and all the gears so the whole thing has to come apart.
Fleet Mechanic
Joined: May 2009
Posts: 1,460
Likes: 6
From: Bay Area, Unfortunately
The NP435 is hands down one of the easiest transmissions to overhaul. As for a whining in first, the first gear is straight cut, therefore it is going to be noisier than the other gears.
Fleet Mechanic
Joined: May 2009
Posts: 1,460
Likes: 6
From: Bay Area, Unfortunately
He said it whines in first, hard shifting 2nd to 3rd. The noise is likely the gear if it is only first. The hard shifting might be in the cover as it is 2 different sets of synchros - hard to tell without more info.
Posting Guru
Joined: Nov 2008
Posts: 1,190
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haha man I feel your pain Its the same way in my diesel and I got the t19 its incredible how tough it is it was driven at least a year with broken synchros and still shifted just fine if you open one up you will be amazed at how thick and hefty the gears are
Postmaster
Joined: Jun 2007
Posts: 3,856
Likes: 1
From: Lebanon
i think i have the T18(*in my donor truck). i am swapping eng for sure, and prob will ****** the 4 speed. donor is 1981, recipient is 86. also F150 vs F250. what obstacles will 86stepside and i be up against. have to cut a hole in floor(which makes me just sick), keeping donors steering column and pedals, have to consider drive shaft length. what else? pilot bushing?
Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
Is the wheelbase the same on the two trucks?
Why the hole in the floor? My '86 has a large screwed down cover around the shifter. If you don't have that hole, get a cover like mine from a salvage yard and make the hole to accommodate that.
Why the hole in the floor? My '86 has a large screwed down cover around the shifter. If you don't have that hole, get a cover like mine from a salvage yard and make the hole to accommodate that.