mechanical 145mph speedo part number
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Junior Member
Joined: May 2003
Posts: 33
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From: North AL
Car: 89 S10 Blazer
Engine: 4.3
Transmission: 700R4
mechanical 145mph speedo part number
from what i have read here the only mechanical 145 mph speedo is from a 85 IROC....anyone know the part number and if it is still avalible from GM?
Joined: Aug 1999
Posts: 19,282
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Mechanicals were in some Camaros from late 86 until 89. Sorry, I can't provide a GM part number. Should you be searching for something used, the Hollander part number is as follows: 257-1058B. You'll probably be asked about gear ratios, but those are insignificant. Plug and play.
JamesC
JamesC
Last edited by JamesC; Jul 11, 2003 at 03:21 PM.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Yes, any will work. I suggest that you simply swap in the speedo head (that way you're assured that all guages will work, providing they already do, of course). This would also be a good time to consider higher intensity 194s and/or white-faced guages. By the way, should the trip odometer be important to you, be careful because many are non-functional--extremely poor engineering on GM's part.
JamesC
JamesC
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