Smittys Eng & Trans

Smittys Eng & Trans Transmission and powertrain service. Fuel injector flow and cleaning (gas/e85), Performance engine building and dyno services.

Welding, custom fabrication / machining. We specialize in high performance and heavy duty drivetrain service. Transmissions, transfer-case and differential repair. Modern computer diagnostics and electronic control systems repair. Also offering engine diagnostic and repair services. 1000hp drag cars and mud trucks to late model front wheel drive mini-vans. Call us for a quote we can do just about anything.

Verifying a troublesome input speed waveform on this 4L65 before sending it back to the customer.
07/10/2026

Verifying a troublesome input speed waveform on this 4L65 before sending it back to the customer.

Tried and True cast iron NP205. Wouldnt be my personal choice but if you want one I will build it!
04/08/2026

Tried and True cast iron NP205. Wouldnt be my personal choice but if you want one I will build it!

When a customers $2500 ATI Performance Products T400 case has the shift pin hole drilled wrong and you have to get creat...
03/24/2026

When a customers $2500 ATI Performance Products T400 case has the shift pin hole drilled wrong and you have to get creative.

These are going to work great on the G-Body project! Why waste all the time, money and effort putting a long tube head...
01/27/2026

These are going to work great on the G-Body project! Why waste all the time, money and effort putting a long tube header on a 250hp SBC? These Ho**er Blackheart cast manifolds will seal better, fit better, last longer and make it much easier to service things under the hood. (like spark plugs!)

Reviving this customers 1988 Monte after it sat in a barn for 20 years. First step is a battery and complete fuel syste...
01/18/2026

Reviving this customers 1988 Monte after it sat in a barn for 20 years. First step is a battery and complete fuel system. Unfortunately the original M4ME quadrajet cannot be salvaged. Now the task of converting to a conventional carburetor while still retaining TCC and timing control. Surprisingly it fired right up on the first try with a test carb.

Customers 727 done and ready to go back in a hotrod. Fresh powdercoat on the case from Reaction Powder Works, 4 pinion ...
01/16/2026

Customers 727 done and ready to go back in a hotrod. Fresh powdercoat on the case from Reaction Powder Works, 4 pinion planets, upgraded direct clutch pack, lots of goodies.

Disco party in the transmission cooler?
01/14/2026

Disco party in the transmission cooler?

Address

3241 Bradleyville Road
Vassar, MI
48768

Opening Hours

Monday 9am - 7pm
Tuesday 9am - 7pm
Wednesday 9am - 7pm
Thursday 9am - 7pm
Friday 9am - 7pm

Telephone

+19892137361

Website

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