Heavy-Duty Reaction Sun Shell for TH700R4/4L60E

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Drivetrain› Automatic Transmissions and Components

Monster Transmission

Heavy-Duty Reaction Sun Shell for TH700R4/4L60E

Name: Heavy-Duty Reaction Sun Shell for TH700R4/4L60E
Brand: Monster Transmission
SKU: 77749HD

$45.12

SKU: 77749HD

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$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Overview

The Monster Transmission 77749HD is a heavy-duty reaction sun shell designed for TH700R4 and 4L60E automatic transmissions. This reinforced component features improved spline durability and is engineered to withstand extreme operating conditions for 1982-up models.

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The Monster Transmission 77749HD, also known as "The Beast" sun shell, is a high-performance hard part upgrade engineered for 1982 and newer 700R4, 4L60E, and 4L70E automatic transmissions. This kit includes the hardened reaction sun shell and a 4-tang washer. Professional installation is recommended to ensure proper fitment and internal clearance. The provided vehicle list serves as a reference, as compatibility varies; users must verify specific year, make, and model requirements to confirm fitment for their particular drivetrain configuration.

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

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Specifications

Brand	Monster Transmission
Part Number	77749HD
Category	Drivetrain

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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.

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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.

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