Replace Torque Converter with a Clutch? - Page 2 - Fuelly Forums
Go Back   Fuelly Forums > Fuel Talk > General Fuel Topics
Search Today's Posts Mark Forums Read
Thread Tools Display Modes
Old 11-21-2007, 12:35 PM   #11
Registered Member
XFi's Avatar
Join Date: Mar 2006
Posts: 323
Country: United States
Thanks, I'm on a budget so I guess I'll stop thinking out loud and just get back to a realistic 5spd manual Trans.

Although some gear or final drive swappin' is definately happening.


Join us for the November 22, 2008 Pennsylvania Meet at Cabela's!
XFi is offline   Reply With Quote
Old 11-21-2007, 06:25 PM   #12
Registered Member
JanGeo's Avatar
Join Date: Jan 2006
Posts: 2,442
Country: United States
Send a message via Yahoo to JanGeo
I think the transmission pump is part of the torque converter isn't it? Taking it out would remove all the hydralic pressure that operates the gear clutches. Would be a great idea though because you would get a great coupling of engine power to the tranny and could shift at really low engine rpms and get some better engine braking too. I would still recommend using the clutch to shift at higher engine RPMs to save the gear clutches.

JanGeo is offline   Reply With Quote
Old 11-21-2007, 08:05 PM   #13
Registered Member
Join Date: Oct 2006
Posts: 303
Country: United States
Below is an excerpt from Wikipedia for hydramatic.

The Automatic Safety Transmission was a tangent outgrowth of this work. The AST was a semi-automatic transmission using planetary gears and a conventional friction clutch, requiring the clutch to shift between forward & reverse gears, but not between the 2 forward gears. Oldsmobile offered the AST from 1937 to 1939; Buick offered it only in 1938. The results were not quite what GM Research had in mind.

Gm did produce a transmission in the 60's that had no external torque converter. It was direct coupled to the engine and used an internal fluid coupling for first and reverse. Otherwise it was as direct as a manual transmission. I changed one once that was in a Cadillac. I cannot seem to find the name of it though.

usedgeo is offline   Reply With Quote
Old 11-25-2007, 10:04 PM   #14
Registered Member
kamesama980's Avatar
Join Date: Nov 2007
Posts: 742
Country: United States
Location: Columbus, IN, USA
Send a message via AIM to kamesama980 Send a message via Yahoo to kamesama980
-for the money, it'z 10x more cost effective to just swap a manual transmission in.
-VW/Audi DSGs are all manual gearboxes with a computer controlled clutch AND shifting
-as mentioned it's not the torque converter that loses most efficiency (it can lock up and only spends 20 seconds disengaged, it's the geartrain components. even at speed with the torque converter locked up, only the newest autos can toyota cressidas, which I'm most familiar with, cars with the manual transmission were actually geared higher (OD=.783 vs .705 for auto) but get 2-5 better mpg for everyone I've known thats kept track

Why did you want the autobox in the first place again? as for loss of efficiency while shifting...not significant. as for speed...I can give most gearboxes over 5 years old a run for their money

1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"
kamesama980 is offline   Reply With Quote

Thread Tools
Display Modes

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Inconsistent Data DesignGoggles Fuelly Web Support and Community News 3 06-07-2011 08:39 AM
More filters for graphs TnS Fuelly Web Support and Community News 3 02-12-2011 01:37 AM
SMS fuelup went to wrong car todd Fuelly Web Support and Community News 4 03-17-2010 02:31 AM
An idea for something new. DTMAce Fuelly Web Support and Community News 2 11-30-2009 01:55 AM
Adding this to my forum site signature JonnyZero Fuelly Web Support and Community News 6 04-10-2009 07:53 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 06:20 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.