8L90 Performance Alto Rebuild

Clutch capacity added in C3,C4 & C5

CDT 8L90 bench rebuild. You will need to ship your transmission to us for the rebuild.

Billet Input Shaft is precision machined from 300M alloy steel & heat treated for additional strength & durability. In order to reduce breaking points, this shaft has an increased radius between the sealing rings. Complete with sealing rings installed.

Alto Clutch Pack Module 

• C3 1-3-5-6-7 Power Pack (Adds 1 additional clutch. G3® friction material is formulated to achieve minimal wear and maximize heat resistance.)

• C4 2-3-4-6-8 Power Pack (Option to add 1 or 2 additional clutches. G3® friction material is formulated to achieve minimal wear and maximize heat resistance.)

• C5 4-5-6-7-8-R Power Pack (Adds 1 additional clutch. G3® friction material is formulated to achieve minimal wear and maximize heat resistance.)

• C1 1-2-7-8-R (Stock clutch capacity.)

• C2 1-2-3-4-5-R (Stock clutch capacity.)

Overhaul Kit This overhaul kit is engineered utilizing premium materials.

Hi-Per Blue® Piston for C1 (1-2-7-8-R). Manufactured with upgraded High-Performance Blue AEM material for superior thermal and chemical resistance with better fit and performance.

GM Filter

*$Price does not include any Hard Part damage, Torque Converter or TCM/ECM tuning. After an internal inspection of your transmission, we will notify you of any hard part damage that will carry an additional cost.

Warranty varies according to application. Please refer to Warranty Info page on our website.

Shipping If you need assistance shipping your transmission, we can arrange Domestic Shipping (averages $250 - $500 each way) for your transmission. Please complete the Shipping Questionnaire on our website (listed under the Contact Us tab) if you would like us to arrange shipping.

Transmission Tuning We do not supply a TCM or ECM tune.

Flushing Cooler & Lines We cannot stress enough the importance of flushing the transmission cooler(s) and lines, even if they are new. We recommend using a Hot Flush Machine or something comparable.

Thank you for the opportunity to assist you.

Stay Safe and Have Fun!

The Crew at CDT