Classic/Antique Car Repair/1930 Model A

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Question
I was driving around in a campground in 1st which had some mild slopes, and started hearing some popping sounds from underneath the car. It felt like something was slipping intermittingly as the gearing was normally hold the car back. The popping feel like small "jerking" movements, where it lets go in and out. Later during the day, drove down a 4% grade, 3rd gear kept the speed down with low RPMs and no foot braking needed. I got to the bottom of the hill and there is no engine braking anymore. When you let off the throttle, it feels like it rolls "freely" as if the clutch is in. When you depress the throttle it engages again and engine revolutions are restored. Let off the throttle for a corner and it rolls freely again with the engine revolutions dropping to an idle. Start offs fine through all three gears and shifts normally. When I got home, I put it in reverse and let out the clutch and nothing. No reverse now. Looked under the car and don't see anything missing. Any ideas? I appreciate your Q & A column on the model A. I am learning from you. Thanks.

Answer
I think you have a serious trans problem.  Make sure it is the trans before you take it apart.  It is not easy getting to the trans.  Try it a few more times and make sure you have no reverse, and /or low gear.  If it ollks like it is the trans, pull off the floor boards and take the cover off the trans.  This is not hard and you can't get into any trouble doing this.  Look inside the trans and look for broken gears.  If you find any, you have to pull the trans and fix it.  A lot of work, but nothing you can't handle.
You need to pull the engine, or the rear end.  If you have an engine hoist, or can borrow one, then pull the engine.  If not, then get a spring spreader and pull the rear end.  Don't ever get under a car on jacks.  Always use good solid jack stands and be very careful.  Don't use concrete blocks, they can break and ruin your whole day.
Take things apart and pull the trans off of the engine.  Get it on a bench and take it apart and you will be amazed at how simple the trans is.  It's like a 25 piece kids puzzle.  Just take it apart and replace the broken pieces and it will go back together.  Clean out all the junk you may find in the bottom.
A lot of hard work, but just think how much you will learn.
good luck
There is an outside chance that you just sheared an axle key.  Pull the rear drums and make sure the keys are OK.
jack

Classic/Antique Car Repair

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jack bahm

Expertise

Only repair type questions on the 1928-1931 Ford Model A.

Experience

Owned one when I was 15 yrs old, and now have owned 5. Still own and play with 2 of them.

Organizations
Oakleaf region of MARC. Model A Restorers Club. I have put several Model A videos on the Oakleaf site that may be of help. Things like how to start the A, how to Time it, how to troubleshoot it.. Go to oakleafregion.org and you will find them. jack

Publications
"More than you need to know about cars." Just a small book for Car Nuts. Blurb.com "Model A Ford Tips and Hints" Blurb.com 2010 Many Model A movies that can be found on youtube.com/jackbahm

Education/Credentials
BSME LSU, 1958, Masters of automotive engineering from the Chrysler Institute of engineering, 1960, MBA Mich State, 1976. Worked as an engineer at Chrysler from 1958 to the end of 1991.

Awards and Honors
Two patents while working in auto industry.

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