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Rebuilt Rib Case Transmission

Rebuilt Rib Case Transmission

Regular price $ 1,795.00 USD
Regular price Sale price $ 1,795.00 USD
Sale Sold out
Shipping calculated at checkout.

Here's a rebuilt gearbox ready to install in any Sprite or Midget. New bearings and synchros have been installed, as well as any new gears and parts as needed. This is the best way to cure an excessively noisy gear box. Or if you have a gearbox that jumps out of gear, this is the ticket!

If you are changing from smooth to rib case transmission, you will need to address the shift lever. Original smooth and ribbed levers are not the same, check the photo for the proper dimensions. Ribbed is longer.

One option is to purchase our exclusive ribbed transmission that accepts the original smooth shift lever. This way, you can use the original smooth case lever.

Another option is to purchase a ribbed gearbox and add-on a ribbed lever that we custom weld here. This way you can use the ribbed lever in your new gear box. Let us know in the notes of your order which one you prefer!

Some people have asked us about the front seal on these transmissions. All our smooth and ribbed transmissions are set- up with the original scroll seal that slings oil back into the transmission. The oil reservoir is below the height of this seal, so they generally would only leak when the car is parked pitched with the rear end upward on a big hill, such that oil can flow out of the front shaft. Should this occur, that oil will run out of the bottom of the bell housing through the weep hole. If you check your transmission oil level routinely, you would top up any lost oil. So the need for a lip seal on the front cover is lost on us, unless you live in San Francisco and routinely park your Spridget on the street with it's tail up-hill.

(Ribbed levers are available by clicking here...)

**Also: when changing from smooth to ribbed, the clutch fork is NOT the same! We offer ribbed case forks here. If you are replacing your trans with the same type, just be sure you have the correct one!

**Does not qualify for free shipping promotions, no credit for smooth case transmissions-if you buy a ribbed, we need a ribbed back. Thanks!

Core exchange is required if you want the core credit refunded-we need a good rebuildable rib case in return so we can rebuild it for the next client. We'll refund $125 on receipt of your rebuildable core. Cores need to be inspected internally before a core refund can be issued, to determine if the internal parts are damaged beyond repair.

Make sure that all needed components are removed from your core. The items that come in our shift lever therapy kit are NOT included in your new rebuilt trans. 

Core return shipping is at your expense.

Cores must be completely drained of all oil before return, otherwise they make a mess in the box and can even fall out of the box during shipment. Any oil soaked or leaking transmission cores will be subject to a reduced or NO core credit.

Cores must be received within six months of receipt of your rebuilt transmission. After six months, cores will not be credited.


If you have reverse lights on our car, you will need the reverse switch equipped shifter extension transferred from your core to your new transmission. Easy to do with six bolts. 

If you are replacing the trans in your 1275 car, you may want to upgrade to our HD Clutch Kit.

Installer's Note: Sprite Transmissions use 20w50 motor oil as transmission fluid.

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