Allison 1000 clear a 3500 crew cab without body lift or floor hacking?

[gearheads78]

My new 88 crew is in huge need for an overdrive. Medium term plan is to 6BT with Allison but thinking about swapping the Allison in now behind the 454 until I can complete the Cummins swap. Anyone know if it will clear the floor?

[wildwilly4x4]

wont even come close. 4l80e takes up all the room available itself.

[gearheads78]

Originally Posted by wildwilly4x4

wont even come close. 4l80e takes up all the room available itself.

Thanks, figured it out earlier. Lucked in to a deal on a Gear Vendors today.

[SCOTI]

Originally Posted by gearheads78

Thanks, figured it out earlier. Lucked in to a deal on a Gear Vendors today.

Ohoo...... I would like to check this out. Nothing like seeing something in person when fact checking. When is the install happening?

[BLE 'BURBAN]

I swapped out my rear end gears from 4:10 to 3:54 and added a gearvendors unit last year to my 87 R30 CCD. Gas mileage almost doubled from 8 to almost 16mpg highway.
When the overdrive kicks in it's like running 2:77 gears.

[wildwilly4x4]

A 4l80e was an easy swap on my 4x4, and its plenty strong enough behind the cummins if you decide to go that route. Sure made driving my '90 model CC a lot better, especially above 65mph. Running 4.10s right now, planning on swapping to my 4.56 axles and still wont be revving too high

[84chevyguyid]

I put a 1000 series allison in my crew cab and it fit under the floor. Mine was a 2 wheel drive and I changed the hump to a bolt in 4x4 hump.I used a Destroked adapter and kept the chevy bellhousing on the trans instead of the sae bellhousing.

[wildwilly4x4]

That looks pretty slick! Ive been researching what trans/ engine combo to run in my next CC build. Been kicking around dmax lbz/ ally, lbz/zf 6, or 6.7/g56 or maybe MDT tranny. Did you have to mount it much lower than a normal swap? Theres no way in heck an Ally would fit behind my 8.1 at the stock mounting height without tunnel mods... Thats why i went 80e.

[gearheads78]

Originally Posted by SCOTI

Ohoo...... I would like to check this out. Nothing like seeing something in person when fact checking. When is the install happening?

Maybe next Sunday. I spent today getting the Cummins swapped C30 ready to sell. I picked up the tan one a couple weeks ago going to use it instead of the white one.

[Mr.Chevy4x4]

Wow, I love the new two tone truck. Sweet score!


Mike

[SCOTI]

Originally Posted by gearheads78

Maybe next Sunday. I spent today getting the Cummins swapped C30 ready to sell. I picked up the tan one a couple weeks ago going to use it instead of the white one.

That dually up for sale..... How clean is the gate? I'm looking to purchase a cleaner red unit vs the one I have on my 89 (looks like the bed is red is why I ask).

The new CC lwb truck is nice. I've seen that one & his 3/4 ton burb. Both were very clean.

[gearheads78]

Originally Posted by SCOTI

That dually up for sale..... How clean is the gate? I'm looking to purchase a cleaner red unit vs the one I have on my 89 (looks like the bed is red is why I ask).

The new CC lwb truck is nice. I've seen that one & his 3/4 ton burb. Both were very clean.

Yea that is the Cummins swap truck I bought almost 2 years ago. Selling it to pay myself back on the tan truck.

Only thing red is the one dually fender