Transmission Ground Wire

[bradartigue]

FIAT disagreed with you; late model cars had one from the transmission to the firewall and one from the engine mount to the coil mount. A third, small one ran from the exhaust cam box to the firewall.

[v6spider]

FIAT disagreed with you; late model cars had one from the transmission to the firewall and one from the engine mount to the coil mount. A third, small one ran from the exhaust cam box to the firewall.

Very inadequate in my humble opinion.. The ground wire from the transmission to firewall is 8 gauge or less.. A bigger wire makes more sense as it will lessen the load on the starter..

Rob

[bradartigue]

FIAT disagreed with you; late model cars had one from the transmission to the firewall and one from the engine mount to the coil mount. A third, small one ran from the exhaust cam box to the firewall.

Very inadequate in my humble opinion.. The ground wire from the transmission to firewall is 8 gauge or less.. A bigger wire makes more sense as it will lessen the load on the starter..

Rob

In a previous post you recommended only one wire, now you're saying it is inadequate to have three? I don't follow you.

None of my cars had 8 gauge wire in the bellhousing - transmission position, they were quite a bit larger, as was the line from the coil stud to the engine mount. The only smallish wire was the exhaust manifold to firewall. I'm not saying these things didn't change over the years, but I think the multiple position grounds are a good idea, and yes the wires should be stout.

[v6spider]

In a previous post you recommended only one wire, now you're saying it is inadequate to have three? I don't follow you.

None of my cars had 8 gauge wire in the bellhousing - transmission position, they were quite a bit larger, as was the line from the coil stud to the engine mount. The only smallish wire was the exhaust manifold to firewall. I'm not saying these things didn't change over the years, but I think the multiple position grounds are a good idea, and yes the wires should be stout.

No worries Brad! Sorry for the confusion.. The wire I was referring to replacing was the transmission to firewall ground. I wasn't suggesting the removal of any other ground wires.


On my 72 spider there was an 8 gauge wire that was spot welded to the underside that was connected to transmission. The battery mounted in the engine compartment.. And the negative cable from the battery was connected to the body.

I moved the battery to the trunk and removed the battery Mount in the engine compartment as well as the transmission to body 8 gauge wire and ran a new 4 gauge wire from the body to the engine.. I also ran a 0 aught custom made battery cable from the trunk to an insulated central terminal on the firewall from there it goes to the selenoid on the starter as well as the other circuits it feeds..Hope this clarifies what I was referring to..

Cheers!
Rob


Cheers!
Ron