BUICK ROADMASTER Transmission & Drivetrain

Ring and Pinion Gears, 4.56:1 Ratio, 30-spline, Standard Rotation, GM 8.5 in., GM 8.6 in., Set

Part Number: MGR-GM10-456A

4.46 out of 5 stars ( 13 )

Estimated Ship Date: Monday 12/22/2025

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Ring and Pinion Installation Kit, GM 7.5/7.625 in., Rear, Kit

Part Number: MGR-R75GRMK

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 12/22/2025

Flexplate, Gold Series, 168-Tooth, Internal Engine Balance, 1-Piece Rear Main Seal, SFI 29.1, TH350, TH400, TH700-R4, Chevy, Small Block, Each

Part Number: PQX-1835005

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 12/22/2025

Wheel Bearing, Front Outer, Each

Part Number: TMK-SET3

4.65 out of 5 stars ( 26 )

Estimated Ship Date: Monday 12/22/2025

Torque Converters, Twister 3/4 Race, 9.600 in. Dia., with Lockup, 30-Spline, 11.125 in. bolt pattern, 2,400-2,800 rpm Stall, 4L60-E, 4L65-E, Each

Part Number: HAY-97-1H24Q

Not Yet Reviewed

Estimated Ship Date: Monday 12/22/2025

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Bearing, Pinion, 1.625 in. Inside Diameter, Each

Part Number: TMK-M802048

4.66 out of 5 stars ( 29 )

Estimated Ship Date: Monday 12/22/2025

Transmission Dipstick, Braided Stainless Steel Housing, Black Handle, Chevy, 4L60E, 4L65E, 4L70E, Each

Part Number: LOK-XTD34L60EFM3

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 12/22/2025

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Gear, Ring and Pinion, EXCel, 3.73:1 Ratio, GM, 7.5/7.625 in., 10-Bolt, Set

Part Number: RMG-GM75373OE

4.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 12/22/2025

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Automatic Transmission Filter, Chevy, GMC, Each

Part Number: ADO-TF289

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 12/22/2025

• $20 Summit Bucks

U-Joint, Light Duty, Spicer SPL25/S44 Type, Each

Part Number: SDH-5-795X

4.76 out of 5 stars ( 17 )

Estimated Ship Date: Monday 12/22/2025

Gear, Ring and Pinion, 3.73:1 Ratio, GM, 7.5 in./7.625 in., 3 Series, Set

Part Number: MGR-G875373

4.45 out of 5 stars ( 11 )

Estimated Ship Date: Monday 12/22/2025

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Automatic Transmission Governor Cover, Stainless Steel, Natural, 700R4, TH350, Each

Part Number: TCI-316861

4.85 out of 5 stars ( 33 )

Estimated Ship Date: Monday 12/22/2025

Axle Bearing, 1.402 in. Bore, 2.252 in. O.D., 0.698 in. Width, Rear, AMC, Chevy, GMC, Chrysler, Ford, Each

Part Number: TMK-5707

4.72 out of 5 stars ( 18 )

Estimated Ship Date: Monday 12/22/2025

Gear, Ring and Pinion, 3.42:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-4902781

5.0 out of 5 stars ( 9 )

Estimated Ship Date: Monday 12/22/2025

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Automatic Transmission Pan, Deep, Aluminum, Natural, GM, 700R4, 4L60E, Each

Part Number: TCI-378000

3.73 out of 5 stars ( 15 )

Estimated Ship Date: Monday 12/22/2025

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Clutch Kits, Street 450 Clutch Conversion Kits, 1.125 in. - 10-spline, Single Organic Disc, 10.500 in. Diameter, Buick, Chevy, Olds, Pontiac, Kit

Part Number: HAY-91-1002

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 12/22/2025

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Differential, Posi Performance, Limited Slip, 28-Spline, for use on GM, 7.625 in., Each

Part Number: ETN-19599-010

4.0 out of 5 stars ( 8 )

Estimated Ship Date: Monday 12/22/2025

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Gear, Ring and Pinion, EXCel, 3.42:1 Ratio, GM, 7.5/7.625 in., 10-Bolt, Set

Part Number: RMG-GM75342OE

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Monday 12/22/2025

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Differential, Lock-Right, Locker, 30-Spline, GM, 8.5 in., Each

Part Number: PWT-1921-LR

4.4 out of 5 stars ( 10 )

Estimated Ship Date: Monday 12/22/2025

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• Mfr. Rebate

$35.00 Mail-In Rebate

Price after Manufacturer Rebate: $450.99

Rebate Expires: 12/31/2025

Get $35 back after rebate on this Powertrax Product! Go to https://www.richmondgear.com/rebate.pdf for details. ...Read More

Get UP TO $55 back after rebate on select Powertrax Products! Go to https://www.richmondgear.com/rebate.pdf for details. Valid on purchases made between 11/1/25 and 12/31/25. Claims must be submitted within 30 days of purchase. Allow 6-8 weeks for processing. Valid in USA and Canada. Limit two qualifying purchases per household or address. This offer cannot be combined with other discounts or offers. Rebate intended for end consumer only. Show Less

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Flywheel, Steel, 168-Tooth, 30 lb., External Balance, Chevy, 4.3, 5.0, 5.7L, Each

Part Number: HAY-10-630

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 12/22/2025

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Transmission Dipstick, Braided Stainless Steel, Black, Bellhousing Mount, Chevy, 4L60E, Each

Part Number: LOK-XTD-34L60ETM

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/22/2025

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Manual Transmission Bellhousing, 621, New, Aluminum, Natural, Blue Bird, Buick, Cadillac, Checker, Chevy, GMC, Jeep, Olds, Pontiac, Workhorse, Each

Part Number: IST-BHG-00104A

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/22/2025

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Bearing, Pinion, 1.312 in. Inside Diameter, Each

Part Number: TMK-M88048

5.0 out of 5 stars ( 13 )

Estimated Ship Date: Monday 12/22/2025

Gear, Ring and Pinion, 3.08:1 Ratio, GM, 8.5/8.6 in., 10-Bolt, 3 Series, Set

Part Number: RMG-4900171

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 12/22/2025

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Axle Seal, Rear Axle Shaft Size-1.399 in., Seal O.D-.2.296, Seal Width-0.460 in., Bidirectional, Each

Part Number: TMK-8660S

5.0 out of 5 stars ( 12 )

Estimated Ship Date: Monday 12/22/2025