88 jeep powertrain opinions - Pirate4x4.Com : 4x4 and Off-Road Forum

lil bit country · 01-28-2011, 10:32 AM

so i have an 88 yj with a 258 and a ba/10 and a np231. so i wana change the motor and trans. im thinking of buying a 4.0 and using my 4.2 internals to stroke it out. also wana change the trans and mayb go with a 4 speed with a low first gear like 6.0 or so like the np435 or t18. the np435 is smaller with a lower first gear. anyway let me know what you guys think from past experiences and builds i wana do this right and do it once not a few times over and over. as for the axles i might get an 8.8 for free and swap that when the rear axle gives out.

MrTuggs · 01-28-2011, 04:20 PM

I like the granny trannys. The np 435 is a good solid trans, if you dont mind the slow shifting. Also if you stay with the drivers side front diff, the np435s are plentiful with bw 1345 transfer cases. By doing that swap your rear driveline would actually have some length, and i think you would have a rear yolk, so no need for an S.Y.E kit.

crashnzuk · 01-28-2011, 06:02 PM

Yup, what he said. It'd be easy to do with Ford stuff. I already had a complete pass drop axle with high steer and locker sitting in storage and I lucked into a CJ t-18 so that's what's in mine. Use the 4.0, get yourself an AMC bell, flywheel, and clutch and hang a Ford 435 on there and be done.
Travis..

lil bit country · 02-03-2011, 08:04 AM

thanks alot guys im thinking of not going with the 4.0 now and rebuilding my 4.2 i want it on the road in a week not a few weeks im getting impaitent and so is my dad its in his driveway after all but im going with the 435

01-28-2011, 10:32 AM	#1 (permalink)
lil bit country Registered User Join Date: Nov 2010 Member # 174684 Posts: 14	88 jeep powertrain opinions so i have an 88 yj with a 258 and a ba/10 and a np231. so i wana change the motor and trans. im thinking of buying a 4.0 and using my 4.2 internals to stroke it out. also wana change the trans and mayb go with a 4 speed with a low first gear like 6.0 or so like the np435 or t18. the np435 is smaller with a lower first gear. anyway let me know what you guys think from past experiences and builds i wana do this right and do it once not a few times over and over. as for the axles i might get an 8.8 for free and swap that when the rear axle gives out.

01-28-2011, 04:20 PM	#2 (permalink)
MrTuggs Registered User Join Date: Jan 2011 Member # 181502 Location: Couver, Wa Posts: 102	I like the granny trannys. The np 435 is a good solid trans, if you dont mind the slow shifting. Also if you stay with the drivers side front diff, the np435s are plentiful with bw 1345 transfer cases. By doing that swap your rear driveline would actually have some length, and i think you would have a rear yolk, so no need for an S.Y.E kit. __________________ 2yjs with cool shiat, dz302 camaro build, guns, pitts, and life on tug boats... Last edited by MrTuggs; 01-28-2011 at 04:20 PM.

01-28-2011, 06:02 PM	#3 (permalink)
crashnzuk Registered User Join Date: Mar 2003 Member # 17632 Location: West Sacramento, CA Posts: 5,370	Yup, what he said. It'd be easy to do with Ford stuff. I already had a complete pass drop axle with high steer and locker sitting in storage and I lucked into a CJ t-18 so that's what's in mine. Use the 4.0, get yourself an AMC bell, flywheel, and clutch and hang a Ford 435 on there and be done. Travis.. __________________ 74 Ramcharger, 360, 4spd, 60/70 on 37s 91.5 Dodge 6BT 5 spd tow rig

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

02-03-2011, 08:04 AM	#4 (permalink)
lil bit country Registered User Join Date: Nov 2010 Member # 174684 Posts: 14	thanks alot guys im thinking of not going with the 4.0 now and rebuilding my 4.2 i want it on the road in a week not a few weeks im getting impaitent and so is my dad its in his driveway after all but im going with the 435