1990 Suburban LQ4/4L80E/D60/14Bolt swap

[KeithT712]

Originally Posted by 83GMCK2500

I was just looking closer, the '90 1500 is this build correct? Where did the D60 and 14FF come from? Was the 14FF with factory disc + parking that came in your 2002 donor/parts truck not rebuildable? Moving spring perches doesn't appear to be out of your skill set.

Thats a good question and it was a cross road that I was at for a decent amount of time The 90 is in fact a 1500, the axles where bought with a matching set of 44 inch bloggers for my mud truck. They're 4.56 gears with rear locker, although the 02 was 4.11 with limited slip g80 diff, which led me to a 4.11 vs 4.56 gearing debate with almost everyone i know. Basically I would either have to re gear the front or the rear

I decided to run with the 4.56s to start mostly because they were already in the older axles and I'm curious to see how they do with 35s.

The 02 axle is a little rougher on the outside than the 4.56 axle was but again nothing that couldn't be cleaned up with some sand (although i never got as far as disassembling it), I figured the option is always there anyway once i decide which gear ratio is going to stay with the truck

[KeithT712]

Slow progress this weekend also, the northeast had a gorgeous weekend so I found myself enjoying it at Killington mountain for the most part but did manage to squeeze in some build time...

Last few finishing touches on the rear end, installed my rear brakes (85 k20 front brakes), tuff country shocks on, and finally hubs and axles in. Now were about ready for wheels and tires

[83GMCK2500]

Originally Posted by KeithT712

Thats a good question and it was a cross road that I was at for a decent amount of time The 90 is in fact a 1500, the axles where bought with a matching set of 44 inch bloggers for my mud truck. They're 4.56 gears with rear locker, although the 02 was 4.11 with limited slip g80 diff, which led me to a 4.11 vs 4.56 gearing debate with almost everyone i know. Basically I would either have to re gear the front or the rear

I decided to run with the 4.56s to start mostly because they were already in the older axles and I'm curious to see how they do with 35s.

The 02 axle is a little rougher on the outside than the 4.56 axle was but again nothing that couldn't be cleaned up with some sand (although i never got as far as disassembling it), I figured the option is always there anyway once i decide which gear ratio is going to stay with the truck

A good friend of mine had a 3.73 geared truck that received a CUCV rear (+ regeared front) when he started towing with it for a while and he said the 4.56s +35s were almost the identical to the 3.73s and stock tires.

Might be too bad you already bought brake parts for the rear axle, I'm not sure if you've seen the 4th product down here: http://www.fourwheeler.com/product-r...-new-products/ I came across it on Pirate a while ago and bookmarked it.

Did you mention, what all will you be doing to the 6.0L?

[KeithT712]

Thats honestly the outcome I'm hoping for with the 4.56s, I think i'll be happy with them just didn't want to spend the money on a locker for the front axle until I know for sure

I wish I had seen that sooner although i cant find brackets or prices on their site, the brake parts wouldn't be a complete loss on my end if i do something different I can just as easily transplant these brakes onto the 14 bolt under my mud truck

And I hadn't mentioned much of the 6.0 yet but its perfect that you asked because that is my next step. After I pulled the motor out of my donor it was completely stripped and sent out to a local machine shop for hot tank, new cam bearings, cylinder hone and just a general check over, along with my crank which was hot tanked and polished.

Once the motor was back to me it was taped and painted, all new bearings, rings & gasket sets ordered and basically its just been covered up on my engine stand waiting for me to reassemble it. (just wanted to finish the axles first)

For a cam I ended up going with tick performance tow max stage 2 after talking with them, I wanted something above stock but nothing too crazy as I hope to tow with it and travel some.

For Heads I'm leaning towards a set of 243/799 for the bump in compression but still haven't made my mind up there either, I figured once the bottom end is reassembled ill have no choice but to pull the trigger one way or the other. But at any rate hopefully I will begin putting the motor back together this week/weekend