Rear End Gear Ratio

[rfitzpatrick]

How can I tell what ratio I have in my '31 Pickup? Is there a tag anywhere?

[Charlie Stephens]

Originally Posted by rfitzpatrick

How can I tell what ratio I have in my '31 Pickup? Is there a tag anywhere?

Your rear end is probably 4.11 if it is original. There is no tag, later ones (the V8's) were stamped but I wouldn't trust the numbers. I replaced the rear end in my '31-RDPU with 3.54 gears and am very happy with the result.

If you have it apart you might consider replacing the rear spring with one from a roadster (unless you plan to use it as a truck).

Charlie Stephens

[rfitzpatrick]

Charlie
Thank you for the rear springs (roadster) change out. I don't use it as a Pickup. It's one rough ride for sure.
Thanks for information never expected.

[Synchro909]

Originally Posted by rfitzpatrick

How can I tell what ratio I have in my '31 Pickup? Is there a tag anywhere?

Chock the front wheels and jack the RHS rear wheel just clear ofd the ground.
Mark the tyre at 12 O'Clock.
Set hand brake to just drag a little.
Select 3rd gear.
Turn engine exactly 2 turns with the crank handle(easier if the plugs are out).
If the mark stops at 11-12 O'Clock, you have 4.11
If the mark stops at 12-1 O'Clock, you have 3.78
If the mark stops at 1-2 O'Clock, you have 3.54

[Tom Endy]

See attached.


Tom Endy

[rfitzpatrick]

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Originally Posted by Tom Endy

See attached.


Tom Endy

Tom

What is the most desirable ratio. I drive for pleasure. It's neat when I get information - even when it's about other than asked (roadster springs)

Thanks

[wmws]

Don't mean to high jack this tread but speaking of springs has anyone had experience with an 8 leaf spring in a Tudor that should have a 10 leaf pack. Will it ride better but still sit right when not loaded.

[BRENT in 10-uh-C]

Originally Posted by wmws

Don't mean to high jack this tread but speaking of springs has anyone had experience with an 8 leaf spring in a Tudor that should have a 10 leaf pack. Will it ride better but still sit right when not loaded.

The quick answer to your questions is No, ...and No. Start a new thread and we will get into why this is.

[Jim Brierley]

Fitz, the best ratio for you depends on the type of driving you do. I like 4.11's and an overdrive, gives good performance around town and is great on the highway.

[rfitzpatrick]

Originally Posted by Jim Brierley

Fitz, the best ratio for you depends on the type of driving you do. I like 4.11's and an overdrive, gives good performance around town and is great on the highway.

Jim
No overdrive. I drive just around the city, no expressways at all. For my Pickup, only will drive secondary roadways. I've no modifications, except for a Randy Gross steering box. Am very interested in the opnions of others whom are stock.
Thanks

[BILL WILLIAMSON]

Who cares what the rear end ratio is??? As long as you're HAPPY, drivin' it.
Bill Nottoworry