Exterior Components Body Panels and Components

TCI Automotive

TH350/TH400 ADJ MODULATOR

$58.95

SKU: T00M 350001TCI

In Stock
In Stock
Ships by Jun 14
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The TCI Automotive 350001TCI is an adjustable vacuum modulator designed for GM TH350 and TH400 automatic transmissions.

This modulator helps tell the transmission what load it's under, allowing for proper line pressures and shift points. It is constructed from steel with a gold iridited finish and can be adjusted to fine-tune part throttle shift points and line pressures by altering diaphragm preload.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandTCI Automotive
Part NumberT00M 350001TCI

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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