Diff ratios again .....

[westy12]

gday what wheels are u running? hq? if your changing the diff then your probably changing the wheels ive got a normal holden banjo diff in mine but had to get my windened stock hq wheels offset on the rear to suit the narrower diff, didnt cost too much. but im sure u could find some wheels to fit. u would just have to reweld the spring and shock mounts. then u could choose whatever diff ratio u want and see whats best! changing the diff centre is a piece of piss. i run a 3.08 with a 202 and trimatic and cruise at around 2700-2800 at 100...went all around oz with a fully loaded van sweet as! ( mind u spent five grand on gas!!!) take it easy... westy

[jesus_is_alright]

gday what wheels are u running? hq? if your changing the diff then your probably changing the wheels ive got a normal holden banjo diff in mine but had to get my windened stock hq wheels offset on the rear to suit the narrower diff, didnt cost too much. but im sure u could find some wheels to fit.

I have a standard width banjo diff and 15x10mags with a 3 3/8 backspace and a 8mm spacer inbetween. I'll be bending the lip on the wheel well down for a tiny bit more clearance when fully loaded.
The 10"mags look great but will need flares, i also have a pair of 15x8.5"mags (maybe for sale soon) with the same backspace, and would probably fit under standard guards with a 235 or 245 tyre
But from memory, hq steel rims are scarily close to the springs and guards with a standard width diff

[BusyKiwi]

Bas, changed the crown wheel and pinion to 3.45, still not 100% happy with it. The speedo is now out so is hard to gauge but keeping up with the traffic on the motorway the speedo is around 110, which cruises at about 1950rpm, at 120k's its at about 2200 rpm which is pretty much the same as the 3.08 gears. I might try find some 3.7 gears after easter

[Bas NZ]

David, slip around one day and look what device they have set up on the box to correct the speedo, it looks like factory but the boys at autolab had no idea, thought the 3.45 would of been a good match.

[jesus_is_alright]

David, slip around one day and look what device they have set up on the box to correct the speedo, it looks like factory but the boys at autolab had no idea, thought the 3.45 would of been a good match.

A speedo redution box? can you take some pics/ and or tell me where you get them?
I'm sure i'll need one very soon

[Gordon]

Hey All. Thanks for the opinions and suggestions voiced so far.
Westy I'm currently running 8 inch HQ studded jellybean style mags on the back. They are 14 inch in diameter and are fitted with 245/50/14 rubber. They are proud of the body by a good bit on each side. I like the look but the authorities may have different ideas .

Hey Busy, sorry to hear that the 3.45 hasn't worked out the way you wanted.

[Gordon]

Hey Aaron

I ran a speedo adjustment type box on my CF2 which was setup for the TH350 auto box and the standard CF2 speedo guage. Unfortunately I don't have a picture of it, but it was manufactured by Keinzle (who I think also make movements for clocks). It was a rectangular aluminium casing bout 3 inches long and 1.5 inches wide and it had a nut type fitting that allowed you to screw it directly into the gearbox where the cable normally goes. Directly next to that fitting on the housing it had a similar fitting that your speedo cable now goes into. If you opened up the box it had two interchangable gears that adjusted the drive ratio. From memory I had it fitted by a crowd who repaired all types of guages. I watched them set it up and they had a measured off distance in their yard. With the cable straight into the gearbox they disconnected the other end from the back of the speedo and counted the number of cable turns over the measured distance. They used their findings to work out the ratios needed in the unit and then selected the appropriate colour coded gear from a box of gears they had. Sorry I don't have the exact details for you.

[Rogue Trooper]

Bas, changed the crown wheel and pinion to 3.45, still not 100% happy with it. The speedo is now out so is hard to gauge but keeping up with the traffic on the motorway the speedo is around 110, which cruises at about 1950rpm, at 120k's its at about 2200 rpm which is pretty much the same as the 3.08 gears. I might try find some 3.7 gears after easter

Jaycar have a kit that you can build to adjust electronic speedos.

[Bas NZ]

Will load a piture of the unit that is used on mine... Will post picture tomorrw as it's to dark out there now...

[jesus_is_alright]

Jaycar have a kit that you can build to adjust electronic speedos.

who has an electric speedo? Bedfords at least have a mechanical speedo