Ford T-18 swap

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FSJfan
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Ford T-18 swap

Postby FSJfan » Sat Oct 07, 2017 10:30 am

What would it take to swap a Ford T-18 in my 77 J10? I currently have the Jeep T-18 in and was wanting a transmission with parts more readily available. What kind of adapter would I need to adapt my Dana 20?
1977 Jeep J10 T-18 w/ wide ratio sitting on 33x12.50 on no lift currently.

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tgreese
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Re: Ford T-18 swap

Postby tgreese » Sat Oct 07, 2017 11:22 am

Why? Except for the input shaft, it's the same transmission as a Ford. Very very unlikely you'll ever need to replace the input shaft.

The short input on the Ford version would put the shifter under the dash.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D

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Stuka
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Re: Ford T-18 swap

Postby Stuka » Sat Oct 07, 2017 3:44 pm

Yeah, no point in doing this swap. Internals are the same for the most part. Bearings and such are all available. And you would need new drive shafts, a different t-case, and the shifter would be funky.

FYI: Ford used a divorced t-case behind the T18 in their trucks.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Stock
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

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tgreese
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Re: Ford T-18 swap

Postby tgreese » Sat Oct 07, 2017 4:28 pm

Don't know about the earlier ones, but by the '80s the Fords use the same long output and long adapter that my J20 uses. Same oddball spline count too, AFAIK.

Image
Last edited by tgreese on Mon Oct 09, 2017 8:31 am, edited 1 time in total.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D

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HeavyMetalThunder_81
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Re: Ford T-18 swap

Postby HeavyMetalThunder_81 » Sat Oct 07, 2017 5:41 pm

The bolt pattern to bolt the trans to the bell housing is different. Where the Ford T-18 pattern is symmetrical the Jeep T-18 pattern has two bolts on one side in different spots. The PTO port is also on the opposite side on the Ford T-18.
-Jonny B.
1979 Jeep Cherokee Golden Eagle - 4" lift, 33x12.5R15
AMC 360 - 4180, TFI, Headers, Dual Exhaust
TH400 - Shift kit, Deep Pan
D20 - Twin Stick'd
F D44 - 3.54:1, Open
R D44 - 3.54:1, Locked
Ristow wrote:the best advice on the thread.

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Stuka
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Re: Ford T-18 swap

Postby Stuka » Sat Oct 07, 2017 5:48 pm

tgreese wrote:Don't know about the earlier ones, but by the '80s the Fords use the same long output and long adapter that my J20 uses. Same oddball spline count too, AFAIK.

Image


I think by the 80's Ford switched to the T19. I know a friend had a '76 with a T18 and it had a divorced 205 behind it.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Stock
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

rocklaurence
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Re: Ford T-18 swap

Postby rocklaurence » Sun Oct 08, 2017 5:51 am

I salavaged a J20 with Ford T18 and Ford NP208. The input shaft is slightly different length and rear is 31 spline. Other than that It is the same as the Jeep T18. It bolted up with the Jeep spacer. I still have the parts on the shelf. Cant seem to sell them--note its not a complete trans, selling the parts

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Stuka
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Re: Ford T-18 swap

Postby Stuka » Mon Oct 09, 2017 6:50 am

rocklaurence wrote:I salavaged a J20 with Ford T18 and Ford NP208. The input shaft is slightly different length and rear is 31 spline. Other than that It is the same as the Jeep T18. It bolted up with the Jeep spacer. I still have the parts on the shelf. Cant seem to sell them--note its not a complete trans, selling the parts


You sure it wasn't a Jeep T18? They did come from the factory in 80's J20's with a 208 behind them. Along with the super long adapter between the trans and t-case and reverse down by 4th instead of up by 3rd.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Stock
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

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Re: Ford T-18 swap

Postby rocklaurence » Tue Oct 10, 2017 6:50 am

No it was different than the other T18s I had on the shelf. The pilot bearing nipple was much longer and it had the 31 spline output shaft to the Tcase. The Tcase was also wider-case was 3: wider pushing it out to the side to clear the trans/exhaust I guess.

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Stuka
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Re: Ford T-18 swap

Postby Stuka » Tue Oct 10, 2017 9:30 am

rocklaurence wrote:No it was different than the other T18s I had on the shelf. The pilot bearing nipple was much longer and it had the 31 spline output shaft to the Tcase. The Tcase was also wider-case was 3: wider pushing it out to the side to clear the trans/exhaust I guess.


80's Jeep T18's have a 31 spline output (Same as ford). 70's have the 10 spline, which fits into the dog gear on the front of the D20.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Stock
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

rocklaurence
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Re: Ford T-18 swap

Postby rocklaurence » Wed Oct 11, 2017 10:51 am

I thought/but maybe wrong that all Jeep output splines were 23 going into the NPs??

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Stuka
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Re: Ford T-18 swap

Postby Stuka » Wed Oct 11, 2017 4:57 pm

rocklaurence wrote:I thought/but maybe wrong that all Jeep output splines were 23 going into the NPs??


True of the TF727, T5, and T17x transmissions. Not for the 80+ T18.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Stock
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

rocklaurence
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Re: Ford T-18 swap

Postby rocklaurence » Thu Oct 12, 2017 11:06 am

Stuka wrote:
rocklaurence wrote:I thought/but maybe wrong that all Jeep output splines were 23 going into the NPs??


True of the TF727, T5, and T17x transmissions. Not for the 80+ T18.

If that's the case, it maybe a Jeep T18


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