th400/quad to th400/?

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th400/quad to th400/?

Postby jeep_j10_1975 » Wed Nov 06, 2013 6:57 pm

i really would like some input on what transfer case i should swap my quadratrac for? im looking for something that can handle 35"-37" tires, a built 401 and the occasional heavy foot. let me know what transfer cases other than the quadra trac that your running behind your th400s, and what was involved in your swap and if your happy with it. thanks
75 J10: 258/t-15/d-20
76 J20: 401/th-400/quadra-trac
77 J20: 360/t-18/d-20

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Re: th400/quad to th400/?

Postby msh227 » Wed Nov 06, 2013 7:13 pm

Stay with the QT. You could put a D20 in but the adapter is balls expensive.
Matt

1978 J10 5.3L/700r4/QT swap in progress.....

37x14.50R15 TOYO Open Country MT
4.56 Gears
6" BJs springs w/ BJs offroad shackles in front & 2" blocks in rear to level.
3" body lift

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viewtopic.php?f=12&t=2300

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Location: Vandalia Il

Re: th400/quad to th400/?

Postby Blazer3664 » Wed Nov 06, 2013 7:59 pm

If you are willing to rebuild the trans (or strip it and put it all back together) to change the tail shaft any t-case from a GM th400 can be bolted up, with the stock adapter it goes with.
203, 205 (kinda semi-rare), 208, and several others.

If you decide to do something like that and need the short 32 spline output for a th400 pm me, I got one I'd send you for a good price.

Jim
1978 Cherokee chief AKA = Butt Ugly
Current status = BACK under construction
modified body w/TJ flares
AMC 360, junkyard TBI, 4L80e
NWF doubler w/ upside down 203
SOA D60/14B-FF
custom shackle flip w/F150 springs
H1 wheels + (for now) tires
-----Coming Soon-----
snorkels, home brew OBA+OBW

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Re: th400/quad to th400/?

Postby jeep_j10_1975 » Wed Nov 06, 2013 8:16 pm

im thinkin i want to use a gm np205. what do i need to swap to this?
75 J10: 258/t-15/d-20
76 J20: 401/th-400/quadra-trac
77 J20: 360/t-18/d-20

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Re: th400/quad to th400/?

Postby tgreese » Thu Nov 07, 2013 4:44 am

jeep_j10_1975 wrote:im thinkin i want to use a gm np205. what do i need to swap to this?


Basically, for any different transfer case ... Get the transfer case. Get the adapter that goes between the transfer case and a TH400. Get the output shaft for a TH400 that fits the transfer case input gear. Remove your TH400 and disassemble it completely to remove the output shaft for the Quadratrac. Reassemble with the new output shaft. Bolt everything together. When the transfer case is back in the Jeep, figure out the linkages, drive shafts, etc.
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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Re: th400/quad to th400/?

Postby Blazer3664 » Thu Nov 07, 2013 5:16 am

^^ What he said.

Junkyard/C-list the adapter and t-case. You might check with your local transmision shops for the output shaft, sometimes just as cost effective since you wont have to strip the trans to get it.

Jim
1978 Cherokee chief AKA = Butt Ugly
Current status = BACK under construction
modified body w/TJ flares
AMC 360, junkyard TBI, 4L80e
NWF doubler w/ upside down 203
SOA D60/14B-FF
custom shackle flip w/F150 springs
H1 wheels + (for now) tires
-----Coming Soon-----
snorkels, home brew OBA+OBW

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