Transmission Identification

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Oct 28, 2004 | 12:32 PM

IrieEye

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Transmission Identification

This question might be kind of remedial, but how do I tell what kind of transmission is in my '91 F150 4x4?

Oct 28, 2004 | 01:04 PM

bigboytoys65

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From: Platteville, WI

Look at the sticker on the driver's side door jamb. Under TR there will a letter--which corresponds to the tranny you have.

U – Automatic 4R70W
E – Automatic E4OD
M – 5 speed manuaoverdrive

Oct 28, 2004 | 01:43 PM

IrieEye

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I should have been more specific. I have a 5-speed manual, but I'm wondering who manufactured it. Borg-Warner or not?

Oct 28, 2004 | 04:12 PM

larry derouin

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From: Glen Burnie Maryland

Probably a M5OD (Fair to Middlin) made by MAZDA! Check the crosshatch pattern. If it's a vertical/horizontal pattern it's a M5OD. If it's diagonal it's a ZF (Better).

Larry

Oct 28, 2004 | 11:57 PM

optikal illushun

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From: Coal Region

dont think the ZF made it into any f-150s after 89 and they were rare. 99% chance says its the mazdog...M5OD

Nov 1, 2004 | 05:22 PM

IrieEye

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Thanks for the help.

With the mazda tranny, should I be able to find a bleeder screw on the internal (cocentric) slave cylinder?

Or do I have to open up the transmission and replace to whole cylinder if my hydrolic fluid needs to flushed?

Nov 1, 2004 | 09:35 PM

dorymate

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From: nova scotia

clutch flush

You dont need to remove anything. Just open bleed screw attach a hose to bleeder and continue to fill up the master cylinder until you get nice fresh brake fluid. After finishing the bleeding process you will have removed 99% of the old fluid.Best of luck.