O. L. T.

iTrader: (17)

We have long had issues on cl with swapping clusters and having the tach read 500 rpm lower between 300 and 400, auto and stick. I was asked this week about the differences so i wanted to post them and help anyone that needs the info. I have been modifying the tach's to make them work properly for switched out clusters by adding the capacitors if they are here for other work.

Notice the motherboard numbers are exactly the same, the difference between the two is that you can see two capacitors on the tach on the right and only one on the left. Beside the chip. These are the difference that makes the tach read 500 rpm off when switching clusters.

Hope it clears up things for people swapping clusters or even engines. Always glad to help.

O. L. T.

iTrader: (17)

Pic 2 ............

O. L. T.

iTrader: (17)

Pic 3 .............

O. L. T.

iTrader: (17)

Last pic. Closeup of the caps.

Smoothlxc

So if I remove the one capacitor from the 98 cluster tach and add 2 smaller capacitors to it, it will read properly? I'm trying to put a 99 sc300 cluster into my 92 sc400 this week.

O. L. T.

iTrader: (17)

I have not done it, but it stands to reason.

babowc

iTrader: (1)

Keep us updated on how that goes..I'm trying to do the same, with a 98 SC300 cluster into a 92 SC400!

chnk

iTrader: (12)

"-There are two thicker black/orange wires on the larger gray plug coming from the engine that supply power to the igniter and injectors. You will need to find a good "switched" 12V source to power these, as they don't recieve any power from the sc400 body. I broke out the multimeter and found an unused by the 1jz pin that had a good 12v switched signal and spliced these two into it."

Anyone have any pictures on this step. Kind of stuck here

kevindcrum

any luck?? I want to swap sc300 5 speed cluster in my sc400 manual swap asap...