350 to LQ4? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 04-17-2011, 03:18 PM
Registered User
Join Date: Oct 2005
Location: las vegas, nevada
Posts: 169
Wiki Edits: 0

Thanks: 1
Thanked 5 Times in 3 Posts
350 to LQ4?

Has anyone run a 350 chevy trans behind a LQ4 motor? or is that even possible? Wise? etc etc etc

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 04-17-2011, 09:44 PM
zildjian4life218's Avatar
Listen and Learn
Last wiki edit: DIY junkyard electrical fan controller
Last journal entry: SBC 305 Twin Turbo
Last photo:
Join Date: Dec 2008
Location: WNY/Rochester, New York
Age: 26
Posts: 1,706
Wiki Edits: 7

Thanks: 45
Thanked 19 Times in 16 Posts
Originally Posted by bill plise
Has anyone run a 350 chevy trans behind a LQ4 motor? or is that even possible? Wise? etc etc etc
Check Google but I'm pretty sure I read somewhere that you need a spacer between the crank flange and flexplate but not 100% sure.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-17-2011, 10:22 PM
Crosley's Avatar
Global Moderator
Last wiki edit: T-350 rebuild tech
Last journal entry: Morris Front suspension
Last photo:
Join Date: Nov 2002
Location: ... USA
Posts: 8,719
Wiki Edits: 1659

Thanks: 663
Thanked 196 Times in 177 Posts
there are flywheels to use with the proper bolt pattern for the converter of the t-350. There is a spacer for the converter pilot hub to 6.0 crankshaft.

Where it gets goofy on 6.0 engines is GM built some 6.0 engines with an extended crankshaft flywheel flange. I was told to avoid these engines for this type of conversions. I do not know how - what - where to determine the 6.0 engine application to avoid
Dont worry how old you are... it is the mileage on your body that adds up.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 04-17-2011, 10:35 PM
Blazin72's Avatar
You got a leaky spark tube...
Last wiki edit: Rearend removal
Last journal entry: General Lee
Last photo:
Join Date: Jul 2005
Location: Union, WA
Age: 33
Posts: 2,868
Wiki Edits: 19

Thanks: 0
Thanked 3 Times in 3 Posts
Originally Posted by bill plise
Has anyone run a 350 chevy trans behind a LQ4 motor? or is that even possible? Wise? etc etc etc
Can you fit a newer 4L60E or 4L80E in your vehicle? The gen III/IV engines came with those transmissions so you should be able to find one that bolts bolts right up. Plus you'd have the benefit of an overdrive.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 04-18-2011, 09:00 AM
Registered User
Last photo:
Join Date: Nov 2010
Location: Calgary,Alberta,Canada
Posts: 252
Wiki Edits: 0

Thanks: 0
Thanked 13 Times in 12 Posts
ls engine swap

there is a spacer for the trans, gm sells it. you will also need a different flex plate. if you don't, the torque converter and pump will fail because the torque converter doesn't fit into the rear of the crank properly so it isn't centred. the early 6.0l vortec with the 4l80e trans is the only one that accepts an early gm auto trans without a flex plate adapter or spacer. these vehicle came with the gm spacer and bolts and that factory flexplate. these are basically the same components needed for the older trans swap, just done at the factory. (copied from the book "how to swap a gm ls series engine into almost anything") you have to use a spacer with longer bolts, or a custom torque converter that has a longer crank hub.bowtie overdrives makes the torque converter that is custom fit to mate up to a stock flexplate. in my opinion it would be better to use the tans and engine combo from whatever the donor vehicle is. get the computer to go with it because they are sort of matched up as far as sensors etc. you may need to get the stock computer flashed when you are done to eliminate some of the stuff you won't be using, like air bags etc. there are several sites to check for that. LS1Tech is a good one.I am putting a 5.3 engine and 4l60e trans in my 57 gmc, so that is what I will be doing with my engine trans combo. haven't got as far as the engine yet. still working on the frame so far.
the how to swap book is ok, there is quite a bit of stuff on specific swaps like into a volvo or a bmw. it does have some basics on stuff like the trans swap and info on what engines are better and what they came in. i have heard there are better books, but the guys on the ls1tech site would maybe be able to help out there. there is a forum there as well.
have fun, kep us posted,
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -6. The time now is 08:59 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.