Reverse snapping
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Jfmarkham
Topic author - Posts: 35
- Joined: Mon Jan 21, 2019 3:15 pm
- First Name: John
- Last Name: Markham
- * REQUIRED* Type and Year of Model Ts owned: 1923 pie wagon
- Location: New york
Reverse snapping
My 1923 has started to occasionally make a snapping sound when its under a heavy load,it does it when backing up a incline or on soft ground. The noise is coming from transmission not rear end,any ideas where to start? Both forward gears work fine
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Daisy Mae
- Posts: 540
- Joined: Mon May 06, 2024 9:32 pm
- First Name: Kurt
- Last Name: Andersson
- * REQUIRED* Type and Year of Model Ts owned: 1914 Touring
- Location: Panama City Beach, FL
- Board Member Since: 2024
Re: Reverse snapping
One possibility, rear end problems can 'transmit' the sound to the tranny.
Mine had the same issue, banging in reverse, but not forward, (backing out of my shop rolls into sand), sounding like it was thumping under my feet.
In my case the driveshaft roller bearing (among other things such as thrust washers) was shot causing the pinion to pop out of mesh with the ring in reverse. It acted fine going forward.
Mine had the same issue, banging in reverse, but not forward, (backing out of my shop rolls into sand), sounding like it was thumping under my feet.
In my case the driveshaft roller bearing (among other things such as thrust washers) was shot causing the pinion to pop out of mesh with the ring in reverse. It acted fine going forward.
Last edited by Daisy Mae on Thu Mar 19, 2026 11:58 pm, edited 1 time in total.
Call me anything you want...just so long as it isn't "late for dinner"
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Scott_Conger
- Posts: 6824
- Joined: Sun Jan 06, 2019 11:18 am
- First Name: Scott
- Last Name: Conger
- * REQUIRED* Type and Year of Model Ts owned: 1919
- Location: not near anywhere, WY
- Board Member Since: 2005
Re: Reverse snapping
Kurt is right
nearly certain it's either pinion roller bearing failure or differential thrust washer failure
stop driving the car NOW. The ring/pinion are undoubtedly being damaged and the longer it's driven the worse the damage will get (including loss of brakes and further related damage).
nearly certain it's either pinion roller bearing failure or differential thrust washer failure
stop driving the car NOW. The ring/pinion are undoubtedly being damaged and the longer it's driven the worse the damage will get (including loss of brakes and further related damage).
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves™
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves™
Obsolete carburetor parts manufactured
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TXGOAT2
- Posts: 8679
- Joined: Sun Feb 14, 2021 10:08 pm
- First Name: Pat
- Last Name: McNallen
- * REQUIRED* Type and Year of Model Ts owned: 1926-7 roadster
- Location: Graham, Texas
- Board Member Since: 2021
Re: Reverse snapping
You might want to block up the rear end and run the car in high at about 15 MPH for ten minutes or so, then shut it off and pull a sample of the rear axle lube. A suction gun works well for this. You will probably find excess metal debris in the lube. Rotating the wheels by hand, and running it in low and reverse while the vehicle is warmed up and on the blocks may reveal more evidence of what may be wrong. Whatever it is, it won't fix itself.