145 speedo

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equalizer442

Active Member
Joined
Oct 23, 2002
Messages
2,501
whats all needed to instal a 145 mph speedo in my gn? can some one walk me threw it step by step?
 
You talking bout a recaliberated 145 speedo over the 85 stock, or a aftermarket dash like a VDO gauge??

The after market is complicated. Never done one, a friend put Kirban's dash in mine. He can do it in 2 hours he has done so many but I think the instructions says 8 to 10 hours.

As far as recailberating the stock head unit, just send it to Kirban, he sends it back with the 145 sticker overlaying the 85 and it's recaliberated. Then just plug it back in.:)
 
ALright

pull gently the front plastic trim around the speedo same clips for the heat-ac

then unscrew the screws that hold the plastic bezeal in place i think that will realease the wole unit

also undo the idiot lights connecting the unit to the car

now i would be very carefull during the whole process and theres
theres a couple wires holding the unit as well as the speed cable now if you want to remove the whole unit which i would then a small screws that hold the vss sensor must be removed

i would buy the kit that anyone sells a rip i would buy the one from buick from hell and then take the unit to get recalabrated

im sure ive missed some things but its been a while

trust me just pay attention dont force anything off and you will be fine

Johnny
 
I assume you have a 145 mph speedo head in your possession. Begin by removing the trim piece surrounding speedo head and warning lights (pull the piece out srtaight, it is held to the dash by clips). Pull it firmly , but be careful not to crack it. I don't know the exact socket sizes, but remove the 2 screws holding the covers that house the waring lights (one on each side of the speedo head, so a total of 4 screws). Remove the 4 screws holding the speedo head to the dash. The speedo head is now loose, but you cannot remove it just yet. Lift the hood and separate the upper speedocable from the lower speedo cable (usually with 2 pairs of pliers). The separation joint is next to and between the master cylinder hydraulic lines. Put a little dielectric grease on the outer protective sheeting of the upper speedo cable near the sealing rubber ring (on the fire wall), then push the upper cable towards the interior of the car. Back into the inside of the car, you may have to lower the steering column (4 bolts on the bottom. If you have to lower the steering column, you also have to remove the 2 screws that hold the DS lower AC vent in position. Once the column is lowered, pull the speedo head foward enough to get your hand behind the speedo head. If you cannot get you hand behind the speedo head, you may have to push on the upper speedo cable more (from the outside). Reach behind the speedo head and there is a clip that you must push in to release the speedo cable. Once you can remove the speedo head, gently lay it down on it's face and there is a small set screw that holds the VSS permanent magnet. Remove the set screw and separate the speedo head from the VSS magnet and take the old speed head out. Transfer the boost and tach gauge (from the old speed head assembly) to the 145 mph spedo head assembly and reverse instructions to re-install. I purchased a recalibrated unit from Kirban (sometimes thay have extras in stock).
 
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