Speedometer Gear Reducer

[69 Post Sedan]

I changed the gears in the Chevelle from 3.73 to 4.56 with 28" tall tires. I need a speedometer gear reducer. The drive gear has 8 teeth and the driven gear has 21 teeth.

Does anyone know how to figure out which one I need or have a part number. The little research I have done says I need one that's has a 20% reduction? [img]<<GRAEMLIN_URL>>/dunno.gif[/img]

Thanks, Kurt

[Postsedan]

Did you call Crash?

Dan

[69 Post Sedan]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Postsedan</div><div class="ubbcode-body">Did you call Crash?

Dan </div></div>

Not yet but the guy who built my trans was really close as I need about a 20% reducer. After sitting on the computer for this whole time, I know GM has a .8241 (3950352) which would get me to 2.707 and I'm currently at 2.65.

I'll keep searching or buy a aftermarket one and change the driven gear on the trans if needed.

And I'm NOT going to pay $236.55 for one!

.8241 Adapter on eBay

Kurt

[Postsedan]

I bet Crash has it, and at a fair price [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

Dan

[69 Post Sedan]

I found a .800 reducer on GM Parts Direct but I think the shipping is a bit much. [img]<<GRAEMLIN_URL>>/shocked.gif[/img]

$411.54 shipping?????

Kurt

[crash]

Kurt, I have several in stock, tell which one do you need...

.7333
.8000
.8241
.8653
.9444
.9743
1.0888
1.1111
1.2020
1.3000

Give me a call... Crash

[email protected]

[Postsedan]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Postsedan</div><div class="ubbcode-body">I bet Crash has it, and at a fair price [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

Dan </div></div>

I guess I`m a broken record [img]<<GRAEMLIN_URL>>/hmmm.gif[/img]

Dan

[396L35]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Postsedan</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Postsedan</div><div class="ubbcode-body">I bet Crash has it, and at a fair price [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

Dan </div></div>

I guess I`m a broken record [img]<<GRAEMLIN_URL>>/hmmm.gif[/img]

Dan </div></div>

Well Dan I was going to save it until this weekend but since you figured it out on your own I will save my breath... [img]<<GRAEMLIN_URL>>/beers.gif[/img]

[Postsedan]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 396L35</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Postsedan</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Postsedan</div><div class="ubbcode-body">I bet Crash has it, and at a fair price [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

Dan </div></div>

I guess I`m a broken record [img]<<GRAEMLIN_URL>>/hmmm.gif[/img]

Dan </div></div>

Well Dan I was going to save it until this weekend but since you figured it out on your own I will save my breath... [img]<<GRAEMLIN_URL>>/beers.gif[/img] </div></div>

Looking forward to seeing you soon.

Dan

[TexasNova]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: crash</div><div class="ubbcode-body">Kurt, I have several in stock, tell which one do you need...

.7333
.8000
.8241
.8653
.9444
.9743
1.0888
1.1111
1.2020
1.3000

Give me a call... Crash

[email protected] </div></div>
Hey crash how do you figure what new speedo gears you need when you change tranny, rear gear, and tires? I know there is a formula but how to you apply it to the gears to recalibrate the speedometer?