Drivetrain› Differentials and Rear-End Components

USA Standard Gear

Differential Rebuild Kit with Synchronizer Rings

$200.99

SKU: ZMBK149A

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

This kit features aluminum case and top cover construction, cast number 1352, and includes synchronizer rings, multi-piece 1st-2nd gear synchro rings, and a reverse synchro ring. It also includes the Lm48548/Lm48510 input bearing and a flat roller input pocket bearing.
Show original supplier description
The USA Standard Gear ZMBK149A is a comprehensive bearing and seal kit engineered specifically for T5 Ford manual transmissions. This kit is essential for maintaining or restoring the performance of your 5-speed manual transmission, featuring durable aluminum case and top cover construction with cast number 1352 for reliable performance. The kit includes all necessary components for a thorough rebuild, such as multi-piece 1st-2nd gear synchronizer rings, a reverse synchro ring, the Lm48548/Lm48510 input bearing, and a flat roller input pocket bearing. It is designed for T5 Ford transmission models manufactured in 1985 and newer. This ZMBK149A kit is confirmed to fit specific Ford and Mercury models including the 1987-1992 Ford Mustang T5, 1986-1988 Ford Thunderbird T5, and 1985-1988 Mercury Cougar T5. Proper installation, including correct alignment and torquing to manufacturer specifications, is crucial for optimal performance and longevity. USA Standard Gear brings over 50 years of experience in manual transmission components to deliver quality and reliability. If fitment is confirmed by their sales team and the product does not fit, they will accept returns with no restocking fees provided the item is in like-new condition.

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

BrandUSA Standard Gear
Part NumberZMBK149A
CategoryDrivetrain
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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 Policy

Shipping

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