88_AHB
Well-Known Member
Hey guys,
Have been tossing around the idea of switching things up with rear end gearing and possibly a trans swap. I've done some research on these three transmissions. Right now in my 88 have either a 2.73 or 2.90 gear with a mild 318/904 2500 stall with a 225.70.15 tire.
I've read some posts in here about the A500 swap and it doesn't seem that difficult to do minus the fabbing to the trans cross member etc. So one of my questions has been how much of a RPM drop would you see on a 999 as opposed to a 904 when locked up at say freeway speeds etc? Next, with the A500 is the converter normally locked in all the gears or just 3rd and OD? Was there ever a A500 with a non lockup like the early years of the A518? I know most guys just run the lockup to a switch or something to manually control that. Is a 2500 stall for a M body a little too high? I know it depends on weight,gearing,tires,cam, driving conditions etc. Im spinning around 2300 rpm on the freeway now and not 100% sure if the trans is fully locked and hate to burn the 904 up.
Have been tossing around the idea of switching things up with rear end gearing and possibly a trans swap. I've done some research on these three transmissions. Right now in my 88 have either a 2.73 or 2.90 gear with a mild 318/904 2500 stall with a 225.70.15 tire.
I've read some posts in here about the A500 swap and it doesn't seem that difficult to do minus the fabbing to the trans cross member etc. So one of my questions has been how much of a RPM drop would you see on a 999 as opposed to a 904 when locked up at say freeway speeds etc? Next, with the A500 is the converter normally locked in all the gears or just 3rd and OD? Was there ever a A500 with a non lockup like the early years of the A518? I know most guys just run the lockup to a switch or something to manually control that. Is a 2500 stall for a M body a little too high? I know it depends on weight,gearing,tires,cam, driving conditions etc. Im spinning around 2300 rpm on the freeway now and not 100% sure if the trans is fully locked and hate to burn the 904 up.