Re: Best 4.0 combo

[farna@xxxxxxx]

96+ from a XJ Cherokee, since it's a five speed most likely a Cherokee Sport. DO NOT get one from a Grand Cherokee, or from one of the fancier XJ Cherokees with the security device. I don't think there are any "plain" GCs, though early models may not have the built in security. It's a pain to work around the security system unless you have the original codes -- ask Jim Blair (I think Jim's going to have to change to a basic computer). Those years will have the AX15 five speed. Of course you want a 2WD. The Peugeot BA 10/5 gets a bad rap though. It's fine for a street driven vehicle, but won't hold up to any serious four wheeling or speed shifting. It came in Comanche Eliminator and Cherokee Sports from 87-92 or so. Fours got the AX5, which in reality is about the same strength as the BA 10/5. I'm sure the Peugeot tranny was a supply deal with Renault -- part of the Chrysler buy-out included buying parts from Renault for a few years, apparently three since the HO computer and!
  several other Renault supplied items left for the 1990 model year. I think there was a total number on the Premier, so it continued for a couple more years. 

There were some changes to the engine in 96 -- including the main bearing girdle and a change in the piston skirts. The cast iron header didn't appear until 1999, along with a different intake at least for the Grand Cherokee. Some like it better -- it looks more like the performance manifolds for the old slant six (more curved runners instead of "rounded end log" as used in previous models). There are no real problems with the tubular exhaust. They crack at stress points (the 87-90 is more prone to cracks than 91-98), but the easy fix is to install an exhaust hanger near the front of hte exhaust system -- right at the firewall is the best place. If you get a cracked one they are stainless and easily MIG or TIG welded. Just add a steel gusset or two to strengthen the cracked areas. Naturally the tubular is lighter than the late cast iron one. The 91-98 tubular can easily be split into duals, but a single 2.25" system is more than adequate even for a stroker. I only went 2.25"!
  instead of 2" because I want to eventually install a remote turbo. 2.5" is the max, and I think a bit on the large side unless you're racing at higher rpm. Mines a bit loud cruising with the 2.25" and Dynomax turbo muffler -- you can have a conversation or listen to the radio, forget doing both! 

On August 15, 2005 Jim Boone wrote:

> I have a question;
> 
> If I was to look for a complete 2WD 4.0 and 5 sp trans (or auto - but I prefer manuals), which yr/model would be best?
> 
> I've been tossing different things around in my mind on a drivetrain interchange for the Wagon, and while I have a 360 setup, I keep coming back to a EFI 4.0.  I could look for a complete vehicle that way everything is there for the swap.
> 
> But, I've seen posted different things on the list and other places that this yr engine is best, or that yr trans should be avoided.  What's the best combo/yr/how ti ID?
> 
> Thanks,
> 
> Jim Boone
> Mims, FL
> 
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