Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 05-26-2020, 03:10 PM   #1
Vern A
Junior Member
 
Join Date: Jan 2020
Location: Spruce Grove, AB.
Posts: 5
Default New Clutch Slipping

I just replaced the clutch disc, pressure plate and throw out bearing on my 1932 Ford pick up and it still slips at higher speeds when accelerating. I'm running a stock 1940 Flathead and a Borg Warner T5 five speed. The adapter came from Speedway Motors. I've tried adjusting the clutch but it doesn't help. Everything is dry. I've worked on and built a lot of cars over the years but this kind of has me stumped. If anyone has any ideas I'd really appreciate it.
Vern A is offline   Reply With Quote
Old 05-26-2020, 05:05 PM   #2
JSeery
Senior Member
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 14,266
Default Re: New Clutch Slipping

I would assume that if it is slipping at higher rpms that the pressure plate is not clamping the disk with enough pressure for it to hold. If so you would need to figure out why, clutch disk thickness? Pressure plate springs? Etc.
JSeery is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 05-26-2020, 05:14 PM   #3
tubman
Senior Member
 
tubman's Avatar
 
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 6,312
Default Re: New Clutch Slipping

Is it a 9" clutch? How big?
tubman is offline   Reply With Quote
Old 05-26-2020, 07:27 PM   #4
cas3
Senior Member
 
Join Date: Jan 2011
Location: sw minnesota
Posts: 2,284
Default Re: New Clutch Slipping

i think 40 would still be a 9" with the blob
cas3 is offline   Reply With Quote
Old 05-26-2020, 07:44 PM   #5
tubman
Senior Member
 
tubman's Avatar
 
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 6,312
Default Re: New Clutch Slipping

Quote:
Originally Posted by cas3 View Post
i think 40 would still be a 9" with the blob
You're probably right, but with a '40 engine in a '32 pickup using a T5, it's probably not a good idea to assume anything.
tubman is offline   Reply With Quote
Old 05-26-2020, 07:46 PM   #6
cas3
Senior Member
 
Join Date: Jan 2011
Location: sw minnesota
Posts: 2,284
Default Re: New Clutch Slipping

very true
cas3 is offline   Reply With Quote
Old 05-26-2020, 08:03 PM   #7
Kurt in NJ
Senior Member
 
Kurt in NJ's Avatar
 
Join Date: May 2010
Location: on the Littlefield
Posts: 5,153
Default Re: New Clutch Slipping

How thick is the disc that was used
What flywheel was used-- the 32 flywheel uses about the same clutch as model A
Kurt in NJ is offline   Reply With Quote
Old 05-26-2020, 08:31 PM   #8
Vern A
Junior Member
 
Join Date: Jan 2020
Location: Spruce Grove, AB.
Posts: 5
Default Re: New Clutch Slipping

It's a 9" clutch pressure plate for a '40 Ford and a pressure plate with the T5 splines. The disc seems to be the same thickness as the original one that came with the T5 adaptor kit from Speedway. The engine has never been rebuilt so its original 85hp which is somewhat less now days, isn't overpowering anything I shouldn't think. All the parts are new.
Thanks guys.
Vern A is offline   Reply With Quote
Old 05-26-2020, 08:32 PM   #9
Vern A
Junior Member
 
Join Date: Jan 2020
Location: Spruce Grove, AB.
Posts: 5
Default Re: New Clutch Slipping

The flywheel is '40 Ford
Vern A is offline   Reply With Quote
Old 05-26-2020, 08:41 PM   #10
petehoovie
Senior Member
 
petehoovie's Avatar
 
Join Date: May 2015
Posts: 2,701
Default Re: New Clutch Slipping

Did you have the flywheel refaced or did you rough it up with sandpaper?
__________________
The only thing nice about being imperfect is the joy it brings to others....

"Silver rings, your butt! Them's washers!"
"We shot our way out of that town for a dollar's worth of steel holes." - from 'The Wild Bunch' - 1969

https://www.youtube.com/watch?v=7NReUd2_0u0
petehoovie is offline   Reply With Quote
Old 05-26-2020, 09:18 PM   #11
Vern A
Junior Member
 
Join Date: Jan 2020
Location: Spruce Grove, AB.
Posts: 5
Default Re: New Clutch Slipping

Did the sandpaper thing
Vern A is offline   Reply With Quote
Old 05-27-2020, 03:30 AM   #12
Ray Balukas
Senior Member
 
Ray Balukas's Avatar
 
Join Date: Jul 2011
Location: Deerfield N.H.
Posts: 261
Default Re: New Clutch Slipping

Im not familiar with t5 set-up,but I run a 9" in my 37 panel . Stock 8BA 3 speed Trans. Walt Dupon
t suggested running the 9" with heavy duty springs. I've had it in for 3 years with no slipping problem. Call Ft Wayne Clutch. Talk to Kerry he is familiar with this setup. I forgot to add the first 9" stock clutch did start slipping, when I ordered it I forgot to mention beefing up the springs. The truck had an 11" set-up. "Walt's words were get rid of the 11", its added weight. " It's all about horsepower" Good Luck
Ray Balukas is offline   Reply With Quote
Old 05-27-2020, 07:39 AM   #13
1931 flamingo
Senior Member
 
1931 flamingo's Avatar
 
Join Date: May 2010
Location: new britain,ct 06052
Posts: 8,541
Default Re: New Clutch Slipping

How much free play?? Were all 3 fingers at the same height??
Paul in CT
1931 flamingo is offline   Reply With Quote
Old 05-27-2020, 08:03 AM   #14
AnthonyG
Senior Member
 
AnthonyG's Avatar
 
Join Date: May 2013
Location: Pa.
Posts: 1,663
Default Re: New Clutch Slipping

If it’s still assembled make sure linkage is clean @ pivot points & check ur linkage for any slight bends that might bind. Small bit of grease on pivot points. When I assemble my ‘35 I had similar issue & turned out a bent part of linkage binding. Straitened, cleaned, & lubed resolved. Worth a check before disassembly for other issues.
__________________
Nomad
AnthonyG is offline   Reply With Quote
Old 05-27-2020, 08:30 AM   #15
deuce_roadster
Senior Member
 
deuce_roadster's Avatar
 
Join Date: Oct 2011
Location: Shelton, WA
Posts: 2,670
Default Re: New Clutch Slipping

Not sure if this could cause your issue but a friend of mine (who owns a machine shop) bought a Speedway adapter for a GM 4 speed and because he is a machinist, he checks everything and the machining on the opening for the transmission was off by quite a bit and he had to adjust it. If you take it apart I would check all important measurements and angles, maybe the mounting surface isn't exactly 90 degrees to the CL of the trans.
However I would measure your disk thickness with a micrometer and compare it to a stock Ford disk. I believe the difference between engaged and disengaged is only something like .050 movement on the pressure plate and if the non Ford disk is just a few thousands thinner it could be the problem too. Good luck.
deuce_roadster is online now   Reply With Quote
Old 05-27-2020, 09:11 AM   #16
Automotive Stud
Senior Member
 
Automotive Stud's Avatar
 
Join Date: May 2010
Location: New Jersey
Posts: 549
Default Re: New Clutch Slipping

Hydraulic clutch?
Automotive Stud is offline   Reply With Quote
Old 05-28-2020, 06:59 AM   #17
Frank Miller
Senior Member
 
Frank Miller's Avatar
 
Join Date: May 2010
Location: Auburn, MA
Posts: 1,766
Default Re: New Clutch Slipping

Is it slipping in all gears or just 5th. Maybe a borderline pressure plate that is not doing well with the extra load. You did properly tighten the pressure plate bolts, right? If you take it apart I would start with snugging up the pressure plate until it just holds the pressur plate and then measure distance from the plate to flywheel to get an idea how much it is compressing. If you have an extra clutch and flywheel maybe you can measure the torque required to tighten the pressure plate to compare spring tension. If there is a truck clutch and brake place near you maybe they can help you determine spring pressure.
__________________
“The technique of infamy is to start two lies at once and get people arguing heatedly over which is true.” ~ Ezra Pound
Frank Miller is offline   Reply With Quote
Old 05-28-2020, 07:34 AM   #18
richard crow
Senior Member
 
Join Date: May 2010
Posts: 1,451
Default Re: New Clutch Slipping

what is your rear end gearing if it,s high when your in fith it,s even higher.if all clerance checks out send pressure plate to fort wayne clutch have them increase spring pressure
richard crow is offline   Reply With Quote
Old 05-28-2020, 08:01 AM   #19
deuce_roadster
Senior Member
 
deuce_roadster's Avatar
 
Join Date: Oct 2011
Location: Shelton, WA
Posts: 2,670
Default Re: New Clutch Slipping

Good question from Richard crow. A 9" clutch with an overdrive trans with tall gears would be pretty much guaranteed to slip a 9" clutch in high gear. Besides the rear end ratio, how tall are your rear tires?
deuce_roadster is online now   Reply With Quote
Old 05-28-2020, 08:08 AM   #20
Vern A
Junior Member
 
Join Date: Jan 2020
Location: Spruce Grove, AB.
Posts: 5
Default Re: New Clutch Slipping

Thanks guys this gives me a few things to check out for sure. The rear end is out of a '40 Ford and has 4.?:1 gears in it. I bought it that way and never had it opened up to check exact ratio. The trans has 28% overdrive. I'll check the concentricty of the adaptor to the crankshaft pilot bushing. I'll recheck my mechanical clutch linkage as well. The free play on the pedal is good.
Vern.
Vern A is offline   Reply With Quote
Reply

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

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 12:07 AM.