Pennock's Fiero Forum
  General Fiero Chat
  6t80 transmission

Post New Topic  Post A Reply
Email This Page to Someone! | Printable Version


next newest topic | next oldest topic
6t80 transmission by fierofinatic84se
Started on: 04-24-2015 09:48 AM
Replies: 6 (1212 views)
Last post by: 81 4.9L X-11 on 06-24-2015 05:02 PM
fierofinatic84se
Member
Posts: 38
From: owensboro, ky
Registered: Jan 2013


Feedback score: N/A
Leave feedback

Rate this member

Report this Post04-24-2015 09:48 AM Click Here to See the Profile for fierofinatic84seClick Here to Email fierofinatic84seSend a Private Message to fierofinatic84seEdit/Delete MessageReply w/QuoteDirect Link to This Post
Does anyone know anything about the 6t80 Cadillac XTS transmission, I can't even find a picture of it, all I found was a small mention of its ratings on Wikipedia and that it's built on the same platform as the 6t70 and 6t75, definitely worth looking into for a v8 build, all I can find is that's it'd being coupled with the twin turbo v6
IP: Logged
PFF
System Bot
dobey
Member
Posts: 11572
From:
Registered: Sep 2001


Feedback score: N/A
Leave feedback





Total ratings: 371
User Banned

Report this Post04-24-2015 11:05 AM Click Here to See the Profile for dobeySend a Private Message to dobeyEdit/Delete MessageReply w/QuoteDirect Link to This Post
It's basically the same as the 6t70/75, but with some stronger components. It will also have the High Feature bell housing pattern that the High Feature DOHC V6 engines use. Archie's adapter plate is made for metric bell pattern transmissions, and not the HF bell pattern. It should be possible to make a custom adapter plate for the newer bell pattern though, if you wish.

While the 6t80 is rated for the higher output engine, the LF3 still only makes 369 lbs-ft of torque, so you may likely still need to get a performance build done on it, to be able to support the 570 lbs-ft you were claiming would need to be supported in your other thread. A performance build of the 6t80 might end up with the same specs for max torque that a built 6t75 would take. I'd get in contact with a couple of the shops that do performance builds of the 6t transmissions, and see what they offer for both, and what the cost difference would be.
IP: Logged
fierofinatic84se
Member
Posts: 38
From: owensboro, ky
Registered: Jan 2013


Feedback score: N/A
Leave feedback

Rate this member

Report this Post04-24-2015 11:14 AM Click Here to See the Profile for fierofinatic84seClick Here to Email fierofinatic84seSend a Private Message to fierofinatic84seEdit/Delete MessageReply w/QuoteDirect Link to This Post
I read the thread on the ls4 with the pcs controller for the transmission and how the biggest issue wasn't torque per say but the torque management, and the transmission was still holding up, and if torque management was the biggest issue, the 6t70 and 75, I've also been doing some more research and I've found that the xts actually uses the 6t70 for the fwd version and the 6t80 is actually the awd version, from what I have found, which is why I'm not able to find much on it but if the 6t70 is holding up to that twin turbo, it should be able to hold up to the v8 with proper torque management
IP: Logged
dobey
Member
Posts: 11572
From:
Registered: Sep 2001


Feedback score: N/A
Leave feedback





Total ratings: 371
User Banned

Report this Post04-24-2015 11:38 AM Click Here to See the Profile for dobeySend a Private Message to dobeyEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fierofinatic84se:

I read the thread on the ls4 with the pcs controller for the transmission and how the biggest issue wasn't torque per say but the torque management, and the transmission was still holding up, and if torque management was the biggest issue, the 6t70 and 75, I've also been doing some more research and I've found that the xts actually uses the 6t70 for the fwd version and the 6t80 is actually the awd version, from what I have found, which is why I'm not able to find much on it but if the 6t70 is holding up to that twin turbo, it should be able to hold up to the v8 with proper torque management


From what I can see, the engine/trans pairings are as such:

LTG - 6t70
LFX - 6t75
LF3 - 6t80

The LFX is available in AWD or FWD. The LF3 is only avaialble with AWD. The LTG is not available in the US. The comparison page on the Cadillac web site also doesn't list the 3.16 axle ratio as available for the Premium model, which has AWD as an option, but only the 2.77 ratio, so I think the only difference in the transmissions between AWD and FWD, is that the AWD transmissions have the extra output housing added, to support a driveshaft for the rear wheels.

I expect even the 6t80 won't hold up to full abuse from the LF3 engine, with torque management fully disabled. The factory programming for the torque management tends to be conservative though, to protect the transmissions. A built trans with the torque management pulled back a bit, or all the way out, should be able to handle the power though.
IP: Logged
fierofinatic84se
Member
Posts: 38
From: owensboro, ky
Registered: Jan 2013


Feedback score: N/A
Leave feedback

Rate this member

Report this Post04-24-2015 11:58 AM Click Here to See the Profile for fierofinatic84seClick Here to Email fierofinatic84seSend a Private Message to fierofinatic84seEdit/Delete MessageReply w/QuoteDirect Link to This Post
Lol, Ive Googled the 6t80 and can find hardly anything, though probably the 6t75 is sufficient once built, I found some companies that rebuild them but haven't found much as far as making them much stronger
IP: Logged
fierofinatic84se
Member
Posts: 38
From: owensboro, ky
Registered: Jan 2013


Feedback score: N/A
Leave feedback

Rate this member

Report this Post04-24-2015 12:05 PM Click Here to See the Profile for fierofinatic84seClick Here to Email fierofinatic84seSend a Private Message to fierofinatic84seEdit/Delete MessageReply w/QuoteDirect Link to This Post
Ah, I found some now, after some more in depth searching
IP: Logged
81 4.9L X-11
Member
Posts: 129
From: S. FL, err now Philly !!
Registered: Sep 2006


Feedback score: N/A
Leave feedback

Rate this member

Report this Post06-24-2015 05:02 PM Click Here to See the Profile for 81 4.9L X-11Click Here to visit 81 4.9L X-11's HomePageClick Here to Email 81 4.9L X-11Send a Private Message to 81 4.9L X-11Edit/Delete MessageReply w/QuoteDirect Link to This Post
What info did you find on the performance rebuilds? Got any web links?

Cheers
IP: Logged

next newest topic | next oldest topic

All times are ET (US)

Post New Topic  Post A Reply
Hop to:

Contact Us | Back To Main Page

Advertizing on PFF | Fiero Parts Vendors
PFF Merchandise | Fiero Gallery | Ogre's Cave
Real-Time Chat | Fiero Related Auctions on eBay



Copyright (c) 1999, C. Pennock