dlbenton,
Can the NP435 be used in place of the T-18 on jeeps with the same bellhousing but different clutch set-up?

 

not sure on that.

 

Yes. You need to use a Ford or Jeep NP435, since the Dodge version used a 23 spline input shaft that was longer than the Ford's (unless you want to swap out and use a dodge bellhousing). Also, if you are wanting it for 4WD, then you need to make certain that you get the 4WD transmission. The bolt pattern is different on the output shaft housing for the 2wd model. Ford used some 2WD model transmissions in 4WD trucks with the "divorced" or seperate transfer case, so you need to be careful which one you get. The 2wd has more of a square bolt pattern on the output shaft housing, and the 4wd has the top 2 bolts closer together than the bottom 2.

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.

 

Jebadiah04, can you provide a parts list for this build? Also, can you tell me if the T-18 will bolt up to the NP435?

 

If the noise goes away in fourth, that is a bad countershaft bearing.

 

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.

 

Actually sorry about that guys it actually sometimes shifts hard from 2nd to 3rd, not 3rd to 4th. sorry guys, but might somebody know what that is?

 

Just kind of curious is that hard to fix.

 

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 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.

 

He said noisy in first, second and third! Big difference.

 

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.

 

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

 

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?

 

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.