87 YJ 4.2 -> 4.0 swap questions
 

have an opportunity to pick up a 4.0 engine with under 50k for $500 -
it comes out of an 88 cherokee and comes w/electronics, transfer case,
AT, wheels, tires, etc etc basically everything minus the steering
column and a few other bits i'm not interested in.
what i want to know is this: can i bolt up the 4.0 directly without an
adapter for the transfer case?
and in the event that i want to replace the POS Peugeut tranny
(synchros are worn) with the AT from the cheerokee, can i still use my
current driveshaft?
ideally i would like to have both the 4.0 motor and the AT but i am
currently rather cash poor and limited in terms of workspace...
what's the scoop? can i do it without too much expenditure? my 4.2 is
on its last legs, and if i never see that @#$** Carter carb again it'll
be too soon...
it seems like a good deal to me - private owner not a parts/junk shop.
thanks in advance,
bennett

Re: 87 YJ 4.2 -> 4.0 swap questions
 

also - one more question - the suspension on my YJ is pretty well shot
as well - esp the front leafs which are bent with frozen bushings - can
one use the front springs from a cherokee on a YJ? how about the rear
ones?
thanks.
bennett

Re: 87 YJ 4.2 -> 4.0 swap questions
 

also - one more question - the suspension on my YJ is pretty well shot
as well - esp the front leafs which are bent with frozen bushings - can
one use the front springs from a cherokee on a YJ? how about the rear
ones?
thanks.
bennett

Re: 87 YJ 4.2 -> 4.0 swap questions
 

also - one more question - the suspension on my YJ is pretty well shot
as well - esp the front leafs which are bent with frozen bushings - can
one use the front springs from a cherokee on a YJ? how about the rear
ones?
thanks.
bennett

Re: 87 YJ 4.2 -> 4.0 swap questions
 

You will need a fuel tank with the electric FI fuel pump in it, or an
equivalent external pump. External pumps are problematical, because the
suction side typically doesn't work right and is very very sensitive to
leaks. You will need some way to fit a crank position sensor. Advance
Adapters has a bell housing for this purpose, but I don't know how many
models are available or whether there is an AT version. There is also a
crank pulley CPS adapter available.

Your transfer case input shaft spline count and depth will be different from
what the Cherokee AT uses. The quickest way to solve this problem is to
change the TC input shaft, which requires disassembly of your TC. Don't
know about the drive shaft, but I'll bet the AT from the Cherokee is longer
than what you have now.

Earle

"bobvonbob" <bennettvonbennett@gmail.com> wrote in message
news:1157311178.813600.97270@i3g2000cwc.googlegrou ps.com...
> have an opportunity to pick up a 4.0 engine with under 50k for $500 -
> it comes out of an 88 cherokee and comes w/electronics, transfer case,
> AT, wheels, tires, etc etc basically everything minus the steering
> column and a few other bits i'm not interested in.
> what i want to know is this: can i bolt up the 4.0 directly without an
> adapter for the transfer case?
> and in the event that i want to replace the POS Peugeut tranny
> (synchros are worn) with the AT from the cheerokee, can i still use my
> current driveshaft?
> ideally i would like to have both the 4.0 motor and the AT but i am
> currently rather cash poor and limited in terms of workspace...
> what's the scoop? can i do it without too much expenditure? my 4.2 is
> on its last legs, and if i never see that @#$** Carter carb again it'll
> be too soon...
> it seems like a good deal to me - private owner not a parts/junk shop.
> thanks in advance,
> bennett
>

Re: 87 YJ 4.2 -> 4.0 swap questions
 

You will need a fuel tank with the electric FI fuel pump in it, or an
equivalent external pump. External pumps are problematical, because the
suction side typically doesn't work right and is very very sensitive to
leaks. You will need some way to fit a crank position sensor. Advance
Adapters has a bell housing for this purpose, but I don't know how many
models are available or whether there is an AT version. There is also a
crank pulley CPS adapter available.

Your transfer case input shaft spline count and depth will be different from
what the Cherokee AT uses. The quickest way to solve this problem is to
change the TC input shaft, which requires disassembly of your TC. Don't
know about the drive shaft, but I'll bet the AT from the Cherokee is longer
than what you have now.

Earle

"bobvonbob" <bennettvonbennett@gmail.com> wrote in message
news:1157311178.813600.97270@i3g2000cwc.googlegrou ps.com...
> have an opportunity to pick up a 4.0 engine with under 50k for $500 -
> it comes out of an 88 cherokee and comes w/electronics, transfer case,
> AT, wheels, tires, etc etc basically everything minus the steering
> column and a few other bits i'm not interested in.
> what i want to know is this: can i bolt up the 4.0 directly without an
> adapter for the transfer case?
> and in the event that i want to replace the POS Peugeut tranny
> (synchros are worn) with the AT from the cheerokee, can i still use my
> current driveshaft?
> ideally i would like to have both the 4.0 motor and the AT but i am
> currently rather cash poor and limited in terms of workspace...
> what's the scoop? can i do it without too much expenditure? my 4.2 is
> on its last legs, and if i never see that @#$** Carter carb again it'll
> be too soon...
> it seems like a good deal to me - private owner not a parts/junk shop.
> thanks in advance,
> bennett
>

Re: 87 YJ 4.2 -> 4.0 swap questions
 

You will need a fuel tank with the electric FI fuel pump in it, or an
equivalent external pump. External pumps are problematical, because the
suction side typically doesn't work right and is very very sensitive to
leaks. You will need some way to fit a crank position sensor. Advance
Adapters has a bell housing for this purpose, but I don't know how many
models are available or whether there is an AT version. There is also a
crank pulley CPS adapter available.

Your transfer case input shaft spline count and depth will be different from
what the Cherokee AT uses. The quickest way to solve this problem is to
change the TC input shaft, which requires disassembly of your TC. Don't
know about the drive shaft, but I'll bet the AT from the Cherokee is longer
than what you have now.

Earle

"bobvonbob" <bennettvonbennett@gmail.com> wrote in message
news:1157311178.813600.97270@i3g2000cwc.googlegrou ps.com...
> have an opportunity to pick up a 4.0 engine with under 50k for $500 -
> it comes out of an 88 cherokee and comes w/electronics, transfer case,
> AT, wheels, tires, etc etc basically everything minus the steering
> column and a few other bits i'm not interested in.
> what i want to know is this: can i bolt up the 4.0 directly without an
> adapter for the transfer case?
> and in the event that i want to replace the POS Peugeut tranny
> (synchros are worn) with the AT from the cheerokee, can i still use my
> current driveshaft?
> ideally i would like to have both the 4.0 motor and the AT but i am
> currently rather cash poor and limited in terms of workspace...
> what's the scoop? can i do it without too much expenditure? my 4.2 is
> on its last legs, and if i never see that @#$** Carter carb again it'll
> be too soon...
> it seems like a good deal to me - private owner not a parts/junk shop.
> thanks in advance,
> bennett
>

Re: 87 YJ 4.2 -> 4.0 swap questions
 

I hear that you can't fit the transfer case with full time 4 wheel drive
into a wrangler. I forget the exact name, is it Selectrac?

Troy


"bobvonbob" <bennettvonbennett@gmail.com> wrote in message
news:1157311178.813600.97270@i3g2000cwc.googlegrou ps.com...
> have an opportunity to pick up a 4.0 engine with under 50k for $500 -
> it comes out of an 88 cherokee and comes w/electronics, transfer case,
> AT, wheels, tires, etc etc basically everything minus the steering
> column and a few other bits i'm not interested in.
> what i want to know is this: can i bolt up the 4.0 directly without an
> adapter for the transfer case?
> and in the event that i want to replace the POS Peugeut tranny
> (synchros are worn) with the AT from the cheerokee, can i still use my
> current driveshaft?
> ideally i would like to have both the 4.0 motor and the AT but i am
> currently rather cash poor and limited in terms of workspace...
> what's the scoop? can i do it without too much expenditure? my 4.2 is
> on its last legs, and if i never see that @#$** Carter carb again it'll
> be too soon...
> it seems like a good deal to me - private owner not a parts/junk shop.
> thanks in advance,
> bennett
>

Re: 87 YJ 4.2 -> 4.0 swap questions
 

I hear that you can't fit the transfer case with full time 4 wheel drive
into a wrangler. I forget the exact name, is it Selectrac?

Troy


"bobvonbob" <bennettvonbennett@gmail.com> wrote in message
news:1157311178.813600.97270@i3g2000cwc.googlegrou ps.com...
> have an opportunity to pick up a 4.0 engine with under 50k for $500 -
> it comes out of an 88 cherokee and comes w/electronics, transfer case,
> AT, wheels, tires, etc etc basically everything minus the steering
> column and a few other bits i'm not interested in.
> what i want to know is this: can i bolt up the 4.0 directly without an
> adapter for the transfer case?
> and in the event that i want to replace the POS Peugeut tranny
> (synchros are worn) with the AT from the cheerokee, can i still use my
> current driveshaft?
> ideally i would like to have both the 4.0 motor and the AT but i am
> currently rather cash poor and limited in terms of workspace...
> what's the scoop? can i do it without too much expenditure? my 4.2 is
> on its last legs, and if i never see that @#$** Carter carb again it'll
> be too soon...
> it seems like a good deal to me - private owner not a parts/junk shop.
> thanks in advance,
> bennett
>

Re: 87 YJ 4.2 -> 4.0 swap questions
 

I hear that you can't fit the transfer case with full time 4 wheel drive
into a wrangler. I forget the exact name, is it Selectrac?

Troy


"bobvonbob" <bennettvonbennett@gmail.com> wrote in message
news:1157311178.813600.97270@i3g2000cwc.googlegrou ps.com...
> have an opportunity to pick up a 4.0 engine with under 50k for $500 -
> it comes out of an 88 cherokee and comes w/electronics, transfer case,
> AT, wheels, tires, etc etc basically everything minus the steering
> column and a few other bits i'm not interested in.
> what i want to know is this: can i bolt up the 4.0 directly without an
> adapter for the transfer case?
> and in the event that i want to replace the POS Peugeut tranny
> (synchros are worn) with the AT from the cheerokee, can i still use my
> current driveshaft?
> ideally i would like to have both the 4.0 motor and the AT but i am
> currently rather cash poor and limited in terms of workspace...
> what's the scoop? can i do it without too much expenditure? my 4.2 is
> on its last legs, and if i never see that @#$** Carter carb again it'll
> be too soon...
> it seems like a good deal to me - private owner not a parts/junk shop.
> thanks in advance,
> bennett
>