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OE torque convertor's stall speeds by AL87
Started on: 01-06-2013 12:47 AM
Replies: 11 (626 views)
Last post by: AL87 on 05-03-2014 06:41 PM
AL87
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Report this Post01-06-2013 12:47 AM Click Here to See the Profile for AL87Click Here to Email AL87Send a Private Message to AL87Edit/Delete MessageReply w/QuoteDirect Link to This Post
what are the stock stall speeds for the 4 and 6 cyl fieros?

im looking for oe fitting convertors with different stall speeds, maybe higher, maybe lower depending on what the stock fiero ones are.
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Report this Post01-06-2013 09:45 AM Click Here to See the Profile for IFLYR22Click Here to Email IFLYR22Send a Private Message to IFLYR22Edit/Delete MessageReply w/QuoteDirect Link to This Post
You won't find much. The stock, for TH125C, are around 2800 RPM, if I remember correctly.

Look for 3T40 and TH125C converters.

-Dave
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fieroguru
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Report this Post01-06-2013 10:34 AM Click Here to See the Profile for fieroguruSend a Private Message to fieroguruEdit/Delete MessageReply w/QuoteDirect Link to This Post
The big thing to remember in regards to torque converter stall speeds is that it is just an estimate. Engines with higher torque, or in a heavier vehicle will stall higher, engines with less torque in a lighter vehicle will stall lower.

From what I can see by looking at various online parts specs, the Fiero automatics had 2 different torque converters.

GM72 with a 2060 stall was the primary V6 torque converter and the one used in every 88 regardless of enging. This converter was also optional from 84-87 on the 4cylinders as well. The codes for this one are: FJAB, FJBB FJ2, FJ2B, FJ4, FJ4B, FJ9B

GM73 with a 2385 stall was only used in a portion of the 4cylinder from 84-87. The codes for this one are: FC1, FC1B, FZ1, FZ1B, FZ2, FZ2B, FZCB, FZ3, FZEB, FZPB, FZFB

Here is an incomplete list of other torque converters compatible with the 125C/4T60
GM40: 1630 stall
GM42: 2095
GM63: 1420
GM64: 1420
GM70: 1525
GM71: 1895
GM74: 2560
GM75: 2760

[This message has been edited by fieroguru (edited 01-06-2013).]

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theogre
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Report this Post01-06-2013 02:16 PM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
See also my Cave, Torque Converter
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FFIEROFRED
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Report this Post01-06-2013 07:21 PM Click Here to See the Profile for FFIEROFREDClick Here to Email FFIEROFREDSend a Private Message to FFIEROFREDEdit/Delete MessageReply w/QuoteDirect Link to This Post
this is what the paper tag on the converter looks like. the converter code is just above the # 3507
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AL87
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Report this Post01-06-2013 07:50 PM Click Here to See the Profile for AL87Click Here to Email AL87Send a Private Message to AL87Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by FFIEROFRED:

this is what the paper tag on the converter looks like. the converter code is just above the # 3507


what does the 3507 mean? I've always assumed it was the stall speed, but I'm not sure.
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theogre
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Report this Post01-07-2013 01:09 PM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by AL87:
what does the 3507 mean? I've always assumed it was the stall speed, but I'm not sure.

No.
Zoom in more then read tag...
FY9B
Then read my cave....
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Joseph Upson
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Report this Post01-07-2013 01:23 PM Click Here to See the Profile for Joseph UpsonClick Here to Email Joseph UpsonSend a Private Message to Joseph UpsonEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by AL87:

what are the stock stall speeds for the 4 and 6 cyl fieros?

im looking for oe fitting convertors with different stall speeds, maybe higher, maybe lower depending on what the stock fiero ones are.


I posted several sheets with stock GM torque converter speeds along with tranmission gear and chain ratios over the auto transaxles used in OBD I apps. You'll have to search for it though. There are several different options.

The highest I recall the Fiero getting is about 2070 with a 3.33 FDR and that was with the Duke, I believe all of the Fiero V6 apps received a 1500 rpm stall. If you can't find it I'll look for it when I get access to my computer.

[This message has been edited by Joseph Upson (edited 01-07-2013).]

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Joseph Upson
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Report this Post01-07-2013 01:29 PM Click Here to See the Profile for Joseph UpsonClick Here to Email Joseph UpsonSend a Private Message to Joseph UpsonEdit/Delete MessageReply w/QuoteDirect Link to This Post
The thread is under; 3&4 spd auto gear ratios, stall spds and IDs


That's a poorly chosen title as far as simplifying a search is concerned but enter that title exactly and it should get you there.

I stand corrected, the V6 received high stall options also, the best combo is the 3.33 and 2000+ stall converter. I had that combo on a base 4 cyl car converted to V6 and it launched very nice from a stop.

http://www.fiero.nl/forum/A...060811-2-070109.html

[This message has been edited by Joseph Upson (edited 01-07-2013).]

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AL87
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Report this Post02-07-2013 09:10 AM Click Here to See the Profile for AL87Click Here to Email AL87Send a Private Message to AL87Edit/Delete MessageReply w/QuoteDirect Link to This Post
okay, thanks for the info, I had to break my neck to look at everything sideways, but its all good, I have a brace that I just took off and my neck is fine.

I have pulled two FJ2B GM72 2060stall torque convertors from 2.8 powered fieros, and oddly enough an FDAB GM42 2095stall from a third one...

[This message has been edited by AL87 (edited 04-30-2014).]

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AL87
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Report this Post04-30-2014 10:40 AM Click Here to See the Profile for AL87Click Here to Email AL87Send a Private Message to AL87Edit/Delete MessageReply w/QuoteDirect Link to This Post
according to the ogre's cave:
the fj2b is the standard tc for the fiero v6 as far as I'm aware.
the fdab has a 215ft/lb damper over the fj2b's 104ft/lb damper.

My new question is this:
what does the clutch damper do? and what does the rating do as far as feel/drivability?
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AL87
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Report this Post05-03-2014 06:41 PM Click Here to See the Profile for AL87Click Here to Email AL87Send a Private Message to AL87Edit/Delete MessageReply w/QuoteDirect Link to This Post
can anyone chime into the question I have about torque convertors above?^^^
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