U2Q7 ATR gearbox into 4th gen - what to do regarding VSS?

hondaddict · Post by **hondaddict** » Wed Jul 06, 2016 12:18 pm

Vtecmec wrote:Perfect English.

How far out would the reading be? Maybe an electrical signal convertor?

Honestly, how far, i don't know but it can be calculated exactly ( it near 4% of difference ) A convertor is also a good solution, if i remember correctly, there's a kind of thing like that for installing an S2000 cluster on others Honda, so maybe it will work in that case.

Dennis van dijk · Post by **Dennis van dijk** » Wed Jul 06, 2016 12:57 pm

I have speedohealer v4 in my bb9 with s2k cluster and it works perfect

Only adjusting it is a little hard but its possible to get it 100% right

My cluster says 1km more than on gps

Only under 30 km/h it doesnt give good readings but this is because i didnt want to adjust any more lol

Post by **Vtecmec** » Wed Jul 06, 2016 3:07 pm

hondaddict wrote:Honestly, how far, i don't know but it can be calculated exactly ( it near 4% of difference ) A convertor is also a good solution, if i remember correctly, there's a kind of thing like that for installing an S2000 cluster on others Honda, so maybe it will work in that case.

4% over or under? The standard is about 10% in anycase. If it under it'll give you a more accurate reading than factory.

Jack · Post by **Jack** » Mon Jul 18, 2016 2:57 am

I don't mind it being out by such a small percentage, the ATR runs 215/45/17s and the GTR wheels I have for the Prelude have 205/45/16 tyres. According to my calculations, it'll read 4.84% lower at 80mph, and seeing as most speedos run at 10% over, it'll actually make the speedo more accurate.

So are these the bits I should be using?

As long as the speedo is about right and the speed sensitive steering is correct, that'll do.

I've not had the VSSs apart yet too see if the above is possible - pics would be appreciated

Post by **Vtecmec** » Mon Jul 18, 2016 8:58 am

I've not mated an atr to a lude VSS, but I have combined a 4th gen auto with a 5th gen manual and they went together ok.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon Jul 18, 2016 6:53 pm

Plenty of people on here that have fitted a U2Q7 box to a lude... so hopefully someone should have practical experience to share!

K30DPC · Post by **K30DPC** » Tue Jul 19, 2016 12:07 pm

I had to swap gears only. And speedo is about right with my GPS.

Jack · Post by **Jack** » Tue Jul 19, 2016 7:26 pm

K30DPC wrote:I had to swap gears only. And speedo is about right with my GPS.

The gear at the bottom of the VSS or inside the gearbox?

K30DPC · Post by **K30DPC** » Tue Jul 19, 2016 11:37 pm

At the bottom mate.

Froidas · Post by **Froidas** » Wed Jul 20, 2016 9:29 am

Correct, I did the same - swapped only the gears.
It is impossible to do the above (use top part and lower part) because the length of axles is different.

I did it with a hammer, but it is risky, very easy to break the split side of axle. I had 3 Prelude VSSs, so I just tried and succeeded.
I would suggest to do it with a press.