I heard that changing the gears in my car will throw my speedo off. I'm looking at upgrading my rearend gearing, but what can I do to correct the problem of the speedo?

-Mike

 

You will need a new set of speedo gears. They are plastic and go into the tranny. About $15 for the pair and avail at any GM dealer.

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-Justin-
T-Top '86 5.0L LG4 700R4 WS6 Now Bilstein equipped!
T-Top '92 5.0L TBI 700R4
My '86 Firebird Homepage
The F-body Model Kit Pictoral Archive (updated 9/18/00)

There can be only one!!

 

New speedo gears may or may not require a new speedometer gear sleeve as well.

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1984 Silver Z28, 383 cid long-rod 4 bolt SBC, ARP Bolts, 2 1/2" Cowl w/ Cold Air Induction, 600 cfm Performer Carburetor, Torker II Intake, Performer RPM Heads, XE268H Cam, Roller Tip Rockers, MSD6A Ignition, Blaster2 Coil, HEI Distributor w/ Adjustable Advance, 700R4, TransGo SK, 2.73:1 Limited Slip Dana 44, Terminator Headers, Custom 3" TIG Welded Stainless Exhaust, Flowmaster Muffler, 4 Wheel Disc Brakes, Oil Cooler

 

How much work is this, after I drop in the rearend gears? How time consuming and what must be done to adjust the gears in the tranny? I also heard of a unit that you can splice into the cable running from the gears to the speedo that will allow you to adjust your speedo using dip switches. Has anyone used this>?

 

If you have an auto, then all you have to do is take off the tailshaft. If you have a 5sp, then you have to drop the tranny.

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-Justin-
T-Top '86 5.0L LG4 700R4 WS6 Now Bilstein equipped!
T-Top '92 5.0L TBI 700R4
My '86 Firebird Homepage
The F-body Model Kit Pictoral Archive (updated 9/18/00)

There can be only one!!

 

cool, thanks!

-=-mike-=-