Need speedo sleeve for 89 700R4

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Feb 29, 2004 | 09:58 PM

Slow89Iroc-Z

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Joined: Jan 2002

Posts: 888

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From: Oswego, IL

Car: 1989 Iroc-Z

Engine: 350ci SBC

Transmission: 700R4

Need speedo sleeve for 89 700R4

It is a 9 bolt so I have 3.90 gears now but it came with 2.77 stock. The stock piece is a black plastic cover. The speedo is cable driven. I assume probuilt put in a 15/45 combo for the 3.90's. The stock gear had a metal shaft and the new one is plastic. This is the part number I found : 25512339 is this correct for the new sleeve????

Feb 29, 2004 | 11:28 PM

jmd

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From: Aridzona

Car: `86 SS / `87 SS

Engine: L69 w/ TPI on top / 305 4bbl

Transmission: `95 T56 \ `88 200-4R

That's the right one for a 700-R4 / th350-c / th250-c with a 40-45 (might be 41-45 teeth driven gear.

I thought it was discontinued; when I went looking for one through GM it was. If you need one, I have a couple new ones.