Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 10-27-2019, 11:08 AM   #1
Chip Rodriguez
Junior Member
 
Join Date: Oct 2019
Posts: 3
Default Tranny/diff service

What did I do wrong? Or is what I read wrong? I serviced the trans and diff on the model A, according to what I've read, the trans takes 1.5 pints (24oz). The diff takes 2.25 pints (36oz). I poured 24 oz into the trans thru a tight long funnel, when I pulled the funnel out, it was over filled and about 4oz poured out of the fill hole. The diff took about 30oz before it wouldn't take anymore. Has anybody else had this problem?
Chip Rodriguez is offline   Reply With Quote
Old 10-27-2019, 11:12 AM   #2
Bob C
Senior Member
 
Join Date: May 2010
Location: So Cal
Posts: 6,861
Default Re: Tranny/diff service

The Service Bulletins show 1 pint for the trans and 1.5 pints for the rear axle.


Bob
Bob C is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 10-27-2019, 11:15 AM   #3
wmws
Senior Member
 
wmws's Avatar
 
Join Date: Feb 2013
Location: Coatesville, Pa
Posts: 659
Default Re: Tranny/diff service

How long did you let them drain. In cool weather it takes a long time for all the oil to drain out.
wmws is offline   Reply With Quote
Old 10-27-2019, 02:08 PM   #4
Chuck Sea/Tac
Senior Member
 
Chuck Sea/Tac's Avatar
 
Join Date: May 2010
Location: Between Seattle & Tacoma
Posts: 1,887
Default Re: Tranny/diff service

I don’t know why there’s even a quantity mentioned. Just fill them both to the fill hole!
Chuck Sea/Tac is offline   Reply With Quote
Old 10-27-2019, 04:15 PM   #5
The Master Cylinder
Senior Member
 
The Master Cylinder's Avatar
 
Join Date: Aug 2012
Location: SoCal
Posts: 458
Default Re: Tranny/diff service

Quote:
Originally Posted by Chuck Sea/Tac View Post
I donít know why thereís even a quantity mentioned. Just fill them both to the fill hole!
For the guy that poured 1 qt in the top of his trans instead of 1 pt???
__________________
The Master Cylinder

Enjoying life at the beach in SoCal...
The Master Cylinder is offline   Reply With Quote
Old 10-27-2019, 05:23 PM   #6
Chip Rodriguez
Junior Member
 
Join Date: Oct 2019
Posts: 3
Default Re: Tranny/diff service

I was going off of the Les Andrews model A handbook. Apparently his refill capacities are not correct.
Chip Rodriguez is offline   Reply With Quote
Old 10-27-2019, 05:23 PM   #7
Chip Rodriguez
Junior Member
 
Join Date: Oct 2019
Posts: 3
Default Re: Tranny/diff service

I let both completely drain.
Chip Rodriguez is offline   Reply With Quote
Old 10-27-2019, 06:53 PM   #8
ursus
Senior Member
 
Join Date: May 2010
Location: Oregon
Posts: 1,093
Default Re: Tranny/diff service

Quote:
Originally Posted by Chip Rodriguez View Post
I was going off of the Les Andrews model A handbook. Apparently his refill capacities are not correct.
I recall that his refill capacity listed for the Gemmer steering gear is likewise incorrect on the high side. There are some other errors in both Volumes I and Volume II books. One would think that he would correct these errors in subsequent printings, especially where safety is at issue, but they continue to sell, so whatever...
ursus is offline   Reply With Quote
Old 10-28-2019, 10:40 AM   #9
goodcar
Senior Member
 
Join Date: Apr 2013
Posts: 134
Default Re: Tranny/diff service

Quote:
Originally Posted by Chip Rodriguez View Post
I was going off of the Les Andrews model A handbook. Apparently his refill capacities are not correct.
My Les's Handbook also shows 1.5 pints for the transmission. That has to be a misprint.

I often refer to Le's handbook, it's a great reference but I think taking everything in the book as the absolute gospel can sometimes get you in trouble. I assume all the specs listed apply to a new car fresh off the assembly line. It doesn't account for wear and tear on a 90 year old car, modifications, upgrade changes and everything else. As a newcomer to the Model A hobby it's easy to think you're doing everything correctly just because that's what the book says. As an example, on page 17 the book says torque axle nuts to 125 ft pounds. The spec sheet in back of the book says 100 ft pounds. So when doing a brake job I'm following the book, 125 ft pounds. After that, the next time I removed and replaced the hub, the threads on the axle are nearly stripped. I could see a problem of wallowing out the wheel mounting holes if torquing the lug nuts to 64 ft lbs (page 17).
There are probably many other examples as well. The book is a good place to start but I would also check with someone who is experienced before getting too carried away.
goodcar is offline   Reply With Quote
Old 10-28-2019, 10:51 AM   #10
Bob Bidonde
Senior Member
 
Bob Bidonde's Avatar
 
Join Date: May 2010
Location: Long Island, NY
Posts: 1,782
Default Re: Tranny/diff service

No torque wrenches were used when the Model "A" was built by Ford. Les Andrews arbitrary applies an SAE torque table to bolts of standard sizes regardless of their application.

Since 1962 I have been torquing the rear axle hub nut to 50 lbs-ft. In my opinion, more torque is detrimental to the stress levels in the axle and as you found out, it failed the threads.
__________________
Bob Bidonde
Bob Bidonde 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 03:37 PM.