GXP Bonneville Tranmission - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 02-27-2011, 12:44 PM   #1
Junior Member
Thread Starter
 
Join Date: Feb 2011
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
michael152354 is on a distinguished road
Exclamation GXP Bonneville Tranmission

Hi Guys,

I do not own a bonneville but I am using the 4T80E in my engine swap and I cant seem to find what controls the transmission. Does the 4T80E in the bonneville have a tcm (transmission control module) or is it controlled by a different module? If so, what module?

Thank you for your assistance.
michael152354 is offline   Reply With Quote
Old 02-27-2011, 01:16 PM   #2
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

The 4t80 transmission is not really my area, but looking threw my service manual for that transmission I do not see a separate control unit for the trans. So it should be controlled by the PCM that also controls the engine.
Danthurs is offline   Reply With Quote
Old 02-27-2011, 03:50 PM   #3
Junior Member
Thread Starter
 
Join Date: Feb 2011
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
michael152354 is on a distinguished road
Lightbulb

Well, then what would be the best method of controlling the transmission.

I am pairing a 3800 (n/a Series 3) and a 4T80E (yes I know they arent an exact fit - but all but one bolt lines up and I will make a bracket connector for that one bolt and the hard parts on this trans are more durable than a performance built 4T65E and the 4T80E has a better chain).

Because of the swap; I will have to use a series 2 pcm and a series 2 wiring harness from the 3800 along with the throttle body from a series 2 because I have to have a cable controlled throttle body.

Can I run the engine with the series 2 pcm and the transmission with the stock pcm in the bonneville? ... Little confused as to how to get it working in terms of electrical and computers.
michael152354 is offline   Reply With Quote
Old 02-27-2011, 04:08 PM   #4
Senior Member
True Car Nut
 
sawgunner's Avatar
 
Join Date: Jan 2009
Location: Dover, NH
Posts: 7,122
Thanks: 0
Thanked 0 Times in 0 Posts
sawgunner is on a distinguished road
Default

the 4T80 may run on the S2 PCM but you will have to have the gear ratio changed in the PCM from what ever it is now to the 3.42 or 3.73 gear ratio of the 4T80. do you already have the 4T80?
sawgunner is offline   Reply With Quote
Old 02-27-2011, 04:13 PM   #5
Junior Member
Thread Starter
 
Join Date: Feb 2011
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
michael152354 is on a distinguished road
Default

No, I do not have the 4T80E yet; I plan on purchasing a low mileage (under 20k) transmission from a gxp bonneville from a junkyard. I believe the bonneville used a 3.71? Someone please confirm if you know. I am not sure of the gear ratio of the series 2 grand prix but I am assuming whomever I have tune my car would easily be able to define the new gear ratio?
michael152354 is offline   Reply With Quote
Old 02-27-2011, 06:13 PM   #6
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

If I'm not mistaken a GP trans is 2.93 gear ratio. Another option for the 4t80 is manual control, it'* a bit pricey, but might work for you. http://www.e-transcontrol.com/mcu-0806.htm
Danthurs is offline   Reply With Quote
Old 02-27-2011, 06:41 PM   #7
Junior Member
Thread Starter
 
Join Date: Feb 2011
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
michael152354 is on a distinguished road
Default

Quote:
Originally Posted by Danthurs View Post
If I'm not mistaken a GP trans is 2.93 gear ratio. Another option for the 4t80 is manual control, it'* a bit pricey, but might work for you. http://www.e-transcontrol.com/mcu-0806.htm
Thank you, the g6 I drive has this functionality. However, with the g6 it has a "m" mode where you select the gears by moving the shifter up or down. And when it is in D it drives completely automatic.

With a module like that; will it allow completely automatic and then driver shift control? How to you "engage" dsc?
michael152354 is offline   Reply With Quote
Old 02-28-2011, 10:08 PM   #8
Administratus Emeritus
Certified Car Nut
 
GXP Venom's Avatar
 
Join Date: Jan 2006
Location: Purgatory, Pennsylvania
Posts: 16,538
Thanked 7 Times in 4 Posts
GXP Venom is on a distinguished road
Default

The 4T80E has an internal TCM. Not a tranny guy but google, is your best friend.

Theses guys sell controllers for it.

http://www.black-ridge.com/wiring-and-harnesses.htm
GXP Venom is offline   Reply With Quote
Old 03-01-2011, 07:53 AM   #9
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Dan has some great info, John pulls out a link to info... To contribute in this thread, the bar is pretty high.

Here'* a members thread about using the 4T80 with a 3800, hopefully that helps to answer some of the questions and maybe see how someone else solved the issues.
https://www.gmforum.com/showthread.p...highlight=4t80
BillBoost37 is offline   Reply With Quote
Old 03-01-2011, 09:00 AM   #10
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Yep, he'* the one that pointed out that link to me. He'* had some crazy projects.
Danthurs is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Tranmission additive HLB 2000-2005 3 02-26-2008 11:04 PM
tranmission cooler almikyska Performance, Brainstorming & Tuning 4 04-10-2007 06:03 PM
tranmission slipping intermittantly Corinthone13 2000-2005 5 10-13-2006 10:23 AM
It may be time for a Tranmission rebuild asonofabeach69 1992-1999 6 08-22-2005 04:21 PM
A major problem possibly tranmission Taharka94 1992-1999 3 01-21-2004 02:36 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:36 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.