Clarification about Bonneville transmissions - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 12-16-2004, 01:10 AM   #21
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

I'm convinced that GM stopped using transmission coolers because of the risk of leaks and fires caused when the trani fluid sprays on the front cast exhaust manifold that heats ot about 600* F.

The durability of the 4t65HD trani is directly related to how it is used or abused as the case may be.
Yes the heavy torque converter should be lightened by swapping in a smaller higher stall unit....like Rogue did. The stock units have been know to frag flex plates and other components during 1-2 gear shifts at 6000 rpm.
Also the differential is prone to grenading when doing one wheel burnouts. I would really recommend against one wheel spinning. The pinion shaft does not lubricate properly with trani fluid and will burn up and frag the case. That usually takes out the rest of the trani.
Highly recommended to install a limited slip differential.
Input and output shafts have splined ends that are soft and not very well hardened by heat treatment. That costs GM money so they cheap out.
2000SilverBullet is offline   Reply With Quote
Old 12-16-2004, 04:11 PM   #22
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2004
Location: Glendale, AZ
Posts: 3,459
Thanks: 0
Thanked 1 Time in 1 Post
big_news_1 is on a distinguished road
Default

So basically an Intense torque converter and LSD would go a long way in prolonging the life of a tranny? I was under the impression that a LSD would cause more grip in the tires, putting more pressure on tranny components. Where did I go wrong?
big_news_1 is offline   Reply With Quote
Old 12-16-2004, 04:46 PM   #23
Senior Member
Certified Car Nut
 
Join Date: Jun 2003
Posts: 15,928
Thanks: 0
Thanked 0 Times in 0 Posts
BonneMeMN is on a distinguished road
Default

Actually many of the big dogs use stock diffs, they seem to hold up better. Once you get mad power it'* easy to spin both wheels. After a season or two on Intense Diffs they went back to Stock 4t-65 units, which seemed to last much longer, and they were still plenty able to rip quick 60'*.

FYI, th LSD is just a spring and two plates inside the stock diff, the Quafie unit is what everyone wants, but it'* much more expensive, and heavier.

ALL Automatic transmission have a tranny cooler, stock ones in most bonneville'* are encorporated into the radiator.
BonneMeMN is offline   Reply With Quote
Old 12-16-2004, 09:30 PM   #24
Senior Member
Posts like a Supercharger
 
Join Date: Oct 2004
Location: Winchester, Virginia
Posts: 190
Thanks: 0
Thanked 0 Times in 0 Posts
Taylora is on a distinguished road
Default New tranny at 34,000 miles

When I bought my 1992 Bonneville SSE come to find out the transmission had been replaced at 34,000 miles. The person that had it before me was about 80 years old. I don't know if that is normal for this Bonneville or if it is just a flaw in this car.
Taylora is offline   Reply With Quote
Old 12-16-2004, 10:23 PM   #25
Senior Member
Posts like a 4 Banger
 
Join Date: Apr 2004
Posts: 104
Thanks: 0
Thanked 0 Times in 0 Posts
fojokin is on a distinguished road
Default Re: New tranny at 34,000 miles

Quote:
Originally Posted by Taylora
When I bought my 1992 Bonneville SSE come to find out the transmission had been replaced at 34,000 miles. The person that had it before me was about 80 years old. I don't know if that is normal for this Bonneville or if it is just a flaw in this car.
wow sounded like the old man got ripped off, wow thats sad. Or mabey something really did happen to it who knows...
fojokin is offline   Reply With Quote
Old 12-16-2004, 10:31 PM   #26
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

I would lend that there was something wrong with that trans. that would have been covered under warrenty. GM really dosent like to replace trannys just because they feel like it
1993 SLE is offline   Reply With Quote
Old 12-17-2004, 02:00 AM   #27
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

Quote:
Actually many of the big dogs use stock diffs, they seem to hold up better. Once you get mad power it'* easy to spin both wheels. After a season or two on Intense Diffs they went back to Stock 4t-65 units, which seemed to last much longer, and they were still plenty able to rip quick 60'*.

FYI, th LSD is just a spring and two plates inside the stock diff, the Quafie unit is what everyone wants, but it'* much more expensive, and heavier
Yes that is true for the INTENSE type differentials because they use simple metal plates. The Quaiffes are 3 x more expensive.
That'* why I would strongly recommend using a limited slip unit like DP sells. It uses friction material bonded to the metal plates just like rearwheel drive limited slip units.
......If mine ever gets here, I will tell you more........
2000SilverBullet is offline   Reply With Quote
Old 12-17-2004, 09:29 AM   #28
Senior Member
True Car Nut
 
Join Date: Nov 2002
Location: Texarkana, Texas
Posts: 6,041
Thanks: 0
Thanked 0 Times in 0 Posts
Damemorder is on a distinguished road
Default

Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by 1993 SLE
I would lend that there was something wrong with that trans. that would have been covered under warrenty. GM really dosent like to replace trannys just because they feel like it
That I do agree with...

The earlier 4T60-E'* had some issues with cross leaks in the valve body, also think there were some grounding issues... So I think the 92-93 model years had a few bugs... But I have seen too many go 150,000-200,000 + with no issues...

I think GM finally corrected the problem for the 1994 model year...
Really? That'* great! I've got a 94 tranny waiting around.
Damemorder is offline   Reply With Quote
Old 12-18-2004, 02:59 PM   #29
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2004
Location: Glendale, AZ
Posts: 3,459
Thanks: 0
Thanked 1 Time in 1 Post
big_news_1 is on a distinguished road
Default

I'm sorry guys.... I have to laugh a little when I read through all these posts. There is a wealth of knowledge here, but I'm not yet fluent enough in car-speak to dredge through it and find a straight answer. What I really want to know are the steps I need to take to have a good, solid driveline as I gradually increase engine power with further modding. In discussing this with my buddy from the TCCOA, we're thinking I should get an aftermarket torque converter before doing a cam or valvetrain work. Does this sound right to you guys? I'm very eager to learn anything and everything I can about cars at this point, and I don't quite understand how a torque converter or limited slip will affect the rest of the transmission. Any links you guys can give me would be great. I just need to know what order I should be replacing parts on this beast. Thanks, lol. I need all the help I can get!
big_news_1 is offline   Reply With Quote
Old 12-20-2004, 06:56 PM   #30
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2004
Location: Glendale, AZ
Posts: 3,459
Thanks: 0
Thanked 1 Time in 1 Post
big_news_1 is on a distinguished road
Default

Well, I guess my previous post didn't generate much interest... no biggie. I've got another question though. When our transmission numbers are listed, what comprises the "transmission?" Is it strictly the gearbox, or does it include the torque converter and differential? Is this why people can replace the stock TC and run big power through everything else? If the TC is the weak link, all I need to do is get a new one to handle the added power of PEMs and a cam. Thanks for the help.
big_news_1 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Clarification of OBD 1.5 on 95 bonneville se revans 1992-1999 2 01-06-2012 08:59 AM
Cup Holder clarification Maymybonnieliveforevr 1992-1999 17 12-15-2008 07:27 PM
o2 sensor part number clarification needed for 92 and 98 92BonneSE 1992-1999 2 10-18-2006 02:52 PM
Another 'Monsoon' clarification scottydl Audio (and aftermarket electronics) 3 04-20-2004 06:20 PM
Clarification! willwren Lounge 2 02-28-2003 07:31 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 12:50 AM.


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.