98 Bonneville SE - No 4th Gear / OD - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-21-2010, 08:42 PM   #1
Junior Member
Thread Starter
 
Join Date: Apr 2010
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
jmarquardt is on a distinguished road
Question 98 Bonneville SE - No 4th Gear / OD

In my Bonneville, the 4th Gear / OD is out of it completely. The car drives great other then that. My thoughts are to either rebuild the transmission or to get a pull from a junkyard. Either option requires me to know what kind of transmission I have. From what I've read, this is a 4T65E transmission (correct me if I'm wrong), but there were 2 different models put into this year. Does anyone know how to go about identifiying for sure which one I have? I have called up Pontiac and gave them my VIN and they said they are unable to tell by it. Any help would be greatly appreciated. Thanks in advance.
jmarquardt is offline   Reply With Quote
Old 04-21-2010, 09:14 PM   #2
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

You can get the model # off the metal tag thats on the back side of the trans. Should be something like 5BXW. First # represents model year.
Mike is offline   Reply With Quote
Old 04-22-2010, 12:30 AM   #3
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

Yes, your car should have the 4t65e, the other transmission is the 4t65e-hd, same transmission, just a stronger diff.

There'* a possibility the problem is a stripped 4th gear input shaft. A new hardened shaft is about $60. If that'* not stripped then it could be a stuck valve in the valve body.
Danthurs is offline   Reply With Quote
Old 04-22-2010, 08:04 AM   #4
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

The most common issue will be a stripped 4th gear clutch hub.

For the other gears to operate properly, the soleniods can not be bad. There is no valve in the trans that I am aware of that can stick to cause 4th to not work.

There are a couple options available:
1. Lower your cradle and engine/trans. Remove the side cover, then pump/valve body/channel plate as one unit gaining access to the gears and shaft. Replace shaft and channel plate gaskets, reassemble.
2. Have a trans shop pull and rebuild
3. Get a junkyard trans and swap. The chance with this option is that you get another trans with a bad 4th hub. Sawgunner recently went this route and was unlucky.
BillBoost37 is offline   Reply With Quote
Old 04-26-2010, 11:16 PM   #5
Junior Member
Thread Starter
 
Join Date: Apr 2010
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
jmarquardt is on a distinguished road
Default

Ok. I've been looking at replacement transmissions around here and I found 1 for $125.00, however I need to know if it is a MN3 or M15 transmission. Is that also contained on the tag on the transmission then too I assume? What am I looking for in that number to tell me which one I should replace it with?
jmarquardt is offline   Reply With Quote
Old 04-27-2010, 08:17 AM   #6
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

That is probably the gear ratio indication of the tag. The tag is located on the differential end of the transmission (passengerside).
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
No 4th gear smellbird 1992-1999 11 11-06-2005 02:07 PM
Tug in 4th gear. 95seand78z28 1992-1999 3 11-02-2005 02:21 PM
FYI if you lose 4th gear / no fourth gear / no 4th gear caminated2k 2000-2005 6 07-24-2005 11:26 PM
Harsh upshift from 3rd to 4th gear int_53185 1992-1999 7 09-22-2004 11:41 PM
hesitation from 3rd to 4th gear ?? Drifter420 1992-1999 10 08-14-2002 08:24 PM


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 11:40 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.