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1990 Jeep Comanche 2.1 renault manual transmission


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Hello,

 

I have a 1990 Jeep Comanche with a 2.1 renault diesel engine and manual transmission. I am located in northern Italy and wanted to swap out  my current engine for a Cummins diesel one. My question is, Is this possible? If so what specific cummins engine fits best and what all do I need in terms of parts to be able to pull this off. Thank you

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2 hours ago, renzo1234567 said:

Hello,

 

I have a 1990 Jeep Comanche with a 2.1 renault diesel engine and manual transmission. I am located in northern Italy and wanted to swap out  my current engine for a Cummins diesel one. My question is, Is this possible? If so what specific cummins engine fits best and what all do I need in terms of parts to be able to pull this off. Thank you

 

The 2.1 Renault uses an AX5 manual transmission.

 

It will NOT hold up to a bigger engine.

 

You will need to do a conversion to an AX15 or NV3550  from behind a late model 4.0 with an Advanced Adapter transmission mount kit.

 

 

Again it will NOT hold up.   Period.

 

I put a buick 3800 in my 86 in front of the AX5 that was in it.  Admittedly I was a lead foot, but even when I calmed down a bit and started driving like a reasonable person, I ended up getting 1500 miles out of the transmissions tops before they'd launch the front counter-shaft bearing.

 

 

In your neck of the woods, the best bet will be to purchase a jeep cherokee KJ with a 2.5 or 2.8 VM engine and manual transmission.  Get the engine mounts from a 97+ XJ diesel and then mount the KJ engine in it.  I'd go for the 2.8 turbo diesel and take it from there.

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1 hour ago, SoCalManche said:

I'd say your best bet is the Cummins R2.8. I always wanted to do the 4BT swap in my TJ, but I believe the R2.8 is quite a bit lighter? Some people go wild for the 6BT. 

 

I second the R2.8. However, I am not sure what Italy's emissions laws are. The 2.8 was never a factory installed engine in anything and is only regulated to 1999 US EPA standards on repower. 

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1 hour ago, eaglescout526 said:

Wait hold the phone. A 90 MJ with a 2.1L Renault TD? 
 

 

Anyone here know if Chrysler kept selling the engine across the pond? I know the catalog shows the TD up until 90 but Chrysler just kept the catalog the same for all 84-90 XJs and 86-90MJs. 

Export 2.1 renault through the entire production of MJ, and through 94 to 96 in XJ before picking the 2.5 VM up in 97

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41 minutes ago, JeepcoMJ said:

 

 

In your neck of the woods, the best bet will be to purchase a jeep cherokee KJ with a 2.5 or 2.8 VM engine and manual transmission.  Get the engine mounts from a 97+ XJ diesel and then mount the KJ engine in it.  I'd go for the 2.8 turbo diesel and take it from there.


XJ Diesel engine mounts WILL NOT allow you to bolt in a KJ Diesel engine. 

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44 minutes ago, JeepcoMJ said:

Export 2.1 renault through the entire production of MJ, and through 94 to 96 in XJ before picking the 2.5 VM up in 97

VM 2.5 came along in 94 or 95, and got a revision in 97. The KJ VM 2.5 shares nothing with the XJ VM 2.5. Completely different design. 

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  • 2 weeks later...
On 1/2/2021 at 10:35 AM, renzo1234567 said:

Hello,

 

I have a 1990 Jeep Comanche with a 2.1 renault diesel engine and manual transmission. I am located in northern Italy and wanted to swap out  my current engine for a Cummins diesel one. My question is, Is this possible? If so what specific cummins engine fits best and what all do I need in terms of parts to be able to pull this off. Thank you

 

Why not do a 606 or TDI swap? 

You have the 90s Jeep Cherokees with the VM 2.5 why not just swap that entire drivetrain over? They are very good engines as well and should bolt in relatively easily. 

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