TRExp

Spitfire & GT6 Forum

Differential

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Weezal12 Avatar
Weezal12 Jeff W
San mateo, FL, USA   USA
Want to change differential fluid in 1975 spitfire 1500 . From what I can see the only way is to pump old fluid out and pump new in . Any other way without pulling it out ??

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Doug in Vegas Avatar
Doug in Vegas Douglas D
Las Vegas, NV, USA   USA
No.

They didn't provide a stock drain. That's why many have installed one of their own.

clshore Carter Shore
Beverly Hills, FL, USA   USA
In reply to # 1511992 by Doug in Vegas No.

They didn't provide a stock drain. That's why many have installed one of their own.

Early Spitfire models had a drain, but it was deleted to save money.
You can remove the fill plug on the side and run in a piece of vinyl tubing to extract the old oil with a suction pump:

https://www.amazon.com/Wekster-Multi-Purpose-Transfer-Dipstick-Extractor/dp/B076TMQGMN/ref=sr_1_1_sspa?ie=UTF8&qid=1518045627&sr=8-1-spons&keywords=liquid+suction+pump&psc=1

Then reverse the flow to pump in the new oil.
It's full when the oil is level with the bottom of the fill plug hole.

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Weezal12 Avatar
Weezal12 Jeff W
San mateo, FL, USA   USA
Thanks Doug

CraigL Avatar
CraigL Gold Member Craig Larsen
Santa Clara, CA, USA   USA
i drilled, threaded and installed a plug a few weekends ago. I am so glad I did although you don't need to change oil often. I would have to look at the drill and tap sizes I used (got them off this site). Be sure to use a variable speed drill. The torque of a regular drill may snap the drill bit off in the diff. Use a strong magnet to retrieve the metal particles from the drilling.

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