6.0 to TH350 mating question
Thread Starter
Teching In
Joined: Jan 2013
Posts: 30
Likes: 0
From: Saskatchewan, Canada
6.0 to TH350 mating question I am trying to maintain a budget so I will be keeping the stock transmission in my 70 firebird. The '06 LQ4 I bought came with a 4L80E flex plate, So I was wondering what I would all need to bolt it up to my TH350?
SIDE NOTE: The car currently has a BOP TH350 and I know the LS based engines use a chevy bolt pattern. Will the Chevy TH350 bolt directly in place of the BOP TH350?
SIDE NOTE: The car currently has a BOP TH350 and I know the LS based engines use a chevy bolt pattern. Will the Chevy TH350 bolt directly in place of the BOP TH350?
I believe only the early LQ4 motors with iron heads have the correct flywheel converter spacing for a sbc trans to bolt right up. I think your 2006 will need an adapter flywheel and spacer for the converter snout.
TECH Regular
Joined: Oct 2011
Posts: 408
Likes: 4
is the flywheel dished ,, if so you need this
http://www.ebay.com/itm/New-Speedway-LS-Crank-to-GM-TH350-400-Converter-Sleeve-Adapter-4mm-Centerplate-/381141324137?pt=Vintage_Car_Truck_Parts_Accessories&hash=item58bdcb1169&vxp=mtr
if its flat you need this
http://www.ebay.com/itm/700R4-Early-4L60E-Adapter-to-install-a-LS1-motor-/130944454153?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e7ce5ce09&vxp=mtr
you also need to elongate the converter bolt holes toward the center of the flexplate approximately 1/8 of an inch ,,, a rattail file works well for this purpose
http://www.ebay.com/itm/New-Speedway-LS-Crank-to-GM-TH350-400-Converter-Sleeve-Adapter-4mm-Centerplate-/381141324137?pt=Vintage_Car_Truck_Parts_Accessories&hash=item58bdcb1169&vxp=mtr
if its flat you need this
http://www.ebay.com/itm/700R4-Early-4L60E-Adapter-to-install-a-LS1-motor-/130944454153?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e7ce5ce09&vxp=mtr
you also need to elongate the converter bolt holes toward the center of the flexplate approximately 1/8 of an inch ,,, a rattail file works well for this purpose
Last edited by ijimmy; Feb 26, 2015 at 10:49 AM.
Trending Topics
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
Since you already have a 4l80e flexplate you can bolt right up to a th350. The BOP th350 has a different bolt pattern and will not bolt up directly it may need a BOP to chevy adapter plate. However, check the trans first as some th350`s were cast as dual BOP and chevy cases, if yours has both bolt patterns your good to go. If your DBW its easiest to hook the kickdown cable directly to the gas pedal, unless you want a full manual valvebody.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
