Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Drivetrain› Shifters and Components
AMER SHIFTER
GM 400 TH SINGLE ACTION
SKU: A08A ASCS1G423D1
Easy — 1–2 hours
Overview
The shifter is 100% CNC machined and offers a fully adjustable design for smooth operation and simple installation. It includes a heavy-duty top plate for enhanced mounting positions and provides park and neutral safety lock-out, as well as a neutral safety switch.
Show original supplier description
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
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
| Brand | AMER SHIFTER |
| Part Number | A08A ASCS1G423D1 |
Videos
Best Types of Automatic Shifters | B&M Ratchet Shifter vs Gate
Ar-5 Remote Shifter! #youtubeshorts #automobile #manualcardriving #chevy #cts #ls #turbo
How to Shift a B&M Hammer Shifter
GM 350 (TH) Dual-Action Shifter Installation Video from American Shifter Co.
How to Shift a B&M MegaShifter
Best Shifter For TH400?!?!
How to Shift a B&M Pro Ratchet Shifter
Ford C4 Dual-Action Shifter Installation Video from American Shifter Co.
How to Install TCI Shifter on 4L60E
Short Throw Shifter Install | Econoshift Shifter 1983-2004 Mustang
Speedway Tech Talk - Lokar Shifters
Lokar Lowdown - Clayton Machine Works Gated Automatic Transmission Shifter with Jeffrey Walls
Side Detent Shifter for GM TH200, TH 250, TH350, and TH400
MR. GASKET 7668 FLOOR SHIFTER BASIC CONFIGURATION FOR TURBO 350
How to Shift a B&M Pro Stick Shifter
We’re here — turning wrenches, just like you.
Call us, follow along, or come say hi.
Buy with Confidence
Returns & Fitment
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.
View Full Return PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy