G80 RPO Codes
CF Veteran
Joined: May 2011
Posts: 1,578
Likes: 302
From: Central Iowa
What are you considering “a little fast” for the engine speed?
If it’s an automatic transmission, then it’s not going to shift into drive/overdrive very often due to the additional load when towing, so I’d expect 2,000 - 2,500 RPM to be normal, even at cruising speed on the highway.
If it’s an automatic transmission, then it’s not going to shift into drive/overdrive very often due to the additional load when towing, so I’d expect 2,000 - 2,500 RPM to be normal, even at cruising speed on the highway.
Thanks for the response. The Heritage people did come thru. They found other documents associated with my particular build, and sent them to me by email. Digging into them turned up the codes G80 and GT5. This means that it is the Eaton Locker (GovLock) with the 4.10 ratio.
I thought the engine was running a little fast. Now I know why. The only solution is to find a G80 with the other ratios; maybe one with the 3.21 ratio, since there appears to be no aftermarket replacements available, nor originals either.
I thought the engine was running a little fast. Now I know why. The only solution is to find a G80 with the other ratios; maybe one with the 3.21 ratio, since there appears to be no aftermarket replacements available, nor originals either.
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