NP231 strength ?

[68post]

Is this case good for a 400 to 480 ft lbs smallblock in a '94 scsb K1500 with a manual trans. , ( 3.73 gears and 33's ), ??

edit, I'm not going non-stop mudding, but will ride it hard occasionally somewhere I can cut loose.

[andrewmp6]

I would pass on a np231 i have seen jeeps with a stock 4.0 blow one apart before.And factory they was only in stuff with no power like a v6 s10 on 6 cylinder jeeps.I would look at a np205 maybe dana 300 both of those are strong t cases and have a good aftermarket.

[ryanroo]

you should be able to find a 241 that will bolt right in. they are pretty tough cases. came in GM trucks as well.

[68post]

My truck has a 231 already and was originally a V6 - now a stock '85 350 with a carb and headers. All swapped in before I bought it, along with a nice NV4500 trans. (1994 regular cab short bed K1500)

The high torque engine is and/or was planned for down the road. (407 sbc w/alum heads)

Sounds like I need to find a 241 to swap-in , if possible with my transmission and w/o buying anymore expensive swap parts !

[franken]

68, how are you liking the NV4500?

Is it a low or high (numerically to save time, or synchro vs non) 1st?
What diff ratio do you have?

Sorry to pepper you w/ rude questions... Bad geek!

I've got a 74 K10 frankentruck w/ an 85 (I think) NP208 and SM465. I'm pretty sure the cab's been swapped and who knows where the motor came from. Add to that the rear end is probably also not original.

I'd imagine an originally I6 truck would have low diff gears. 4:10 or 4:56 perhaps?

Thanks and sorry to butt in!

[68post]

Originally Posted by franken

68, how are you liking the NV4500?

Is it a low or high (numerically to save time, or synchro vs non) 1st?
What diff ratio do you have?

Sorry to pepper you w/ rude questions... Bad geek!

I've got a 74 K10 frankentruck w/ an 85 (I think) NP208 and SM465. I'm pretty sure the cab's been swapped and who knows where the motor came from. Add to that the rear end is probably also not original.

I'd imagine an originally I6 truck would have low diff gears. 4:10 or 4:56 perhaps?

Thanks and sorry to butt in!

You are definitely welcome and not butting-in.

The truck was built with 3.73 gears and a 4.3 V6 ( I believe the model would be a "Sport". no chrome but all black trim, grille, and bumpers) I really don't remember if I'd ever bothered to nail down which transmission version ( I didn't install it either), don't think it has a extra low granny and no I don't think it's synchronized.

I wish it had 4.10's or even better 4.56's , but then first gear in high range is too low and low range becomes ridiculously too low.
It is a great trans , and I had the same trans in a 2000 3500HD and it was perfect for that app.