Motor Blown....Advice Needed

[beckel]

Really bad night tonight....

Almost one year to the day since I received my 1992 HMMWV and I believe that the motor has thrown a rod. I have two rather large holes in the oil plan and the starter was struck by the rod and consequently broke the transmission mounting points.

I am considering a 6.5 Optimizer and 4L80 transmission. Can someone please comment on approximately how long it takes to remove and replace the engine and transmission. I recognize that I will also need to shorten the driveshaft and replace the shifter with a 4 spd OD shifter.

Just wondering about how big of a job this is likely to be.


Thanks for any advice!

 

[jdknech]

sorry to hear of your misfortune, I opted to swap out my blown 6.2 with a turbo 6.5 out of a van.. I haven't removed the engine from my hmmwv yet, but I plan to start on it Tuesday night.. good luck! ill be watching to see what you decide to do!

 

[kfrosty]

You've got to do more than that. You'll need a wiring harness to hook up the 4L80e which are kind of pricey. Or you'll need one of the a Transmission Control system such as from
USShift. (Most of the wiring harnesses that come with the 6.5 optimizer take outs have been cut.)

There is a stick for this forum with a link to the swap.

http://www.steelsoldiers.com/showthread.php?152874-Lots-of-Questions-about-4L80E-Swaps

The job is going is going to be as big or as small as your experience. I've got two to do when I finally get the wiring harnesses. I've been waiting 3+ months for them.

 

[fsearls92]

I have a government rebuilt 6.2 in New Mexico if you decide you don't want to go through all the hassle of the 6.5 and 4l80e upgrade.

 

[NDT]

I would only swap in the 4L80e if you routinely need/wish to drive over 55 mph. With all due respect to jdknech's plan of action, dropping in a pull out GEP 6.5 is the way to go. The GEP engines are not 16+ years old like the tired GM engines and are not subject to cylinder wall cracks.

 

[beckel]

Thanks alot guys. Took another look today and there really is no salvaging either the motor or the trans. I am definitely going to go with a late model/low mileage 6.5 GEP and I do drive the truck regularly at 55 so having the 4L80 with park would be a nice upgrade. The one I am looking at has the trans controller but not sure if the wire harness has been cut. I will check that out.

 

[Action]

It is the entire body harness you want. likely was cut when the body was yanked.

 

[86humv]

I guaranty its cut.
They don't have the time to do the extra work to remove body properly which needs to be done.
you'll need trans X member, rear and mid drive shafts, maybe rear diff. yoke, dual brake light switch, shifter .

 

[Action]

.

 

[tage]

Cheapest option would be to replace with a stock engine. 6.5 optimizer is the most preferred. A few members have them laying around and will let them go for a fair price.
Turbo 400's are one of the easiest transmissions to work on. I would find a good core casing if yours is trashed. I bet you can tig those mounts back on though.

 

[beckel]

Here are a few shots of the oil pan.....does this look like a rod went through each side of the pan? Not sure what else could have done this much damage.

 

[Tornadogt]

yep a dead dog...... How does the rest of the truck look?? Fix or pass it on and get another one..... I'll give you $1000.00 for your parts truck. Really I am just picking on you, I have a HMMWV waiting on the EUC to clear, when I get it I am planing on doing a engine/trans/tranfer case swap from a 2001-2007 GM 3/4 ton truck.. (6.0 gas/4L80/np261) The engine/trans I take out will be available but at this point there conditions is unknown..