Re: error code 628 converter clutch error (E4OD)
Sure glad to hear you got it fixed! Actually, that's not a bad price to have somebody else do the work. Do you have an oil cooler on your trans? I think I remember reading that the '95-'96 models have an improved design? I'll see if I can dig that info up.
I found that info. Sorry, it's a little long:
If it becomes necessary to overhaul your E4OD transmission, you should perform as many updates as
possible if it is a pre-1995 unit. E4OD component updates include, as an example, the following items:
Improved (thicker) converter clutch piston (circa 1994), prevents the formation of cracks which relieve
fluid pressure from the apply side of the clutch, causing it to slip and even bluing the outside surface
of the torque converter in extreme cases. Ensure that your new converter contains an updated OEM or
"LuK" brand heavy-duty clutch. This can be difficult, as many torque converter suppliers and
remanufacturers may not use this new style of clutch.
Higher displacement front pump (for 1995) provides more fluid capacity for faster engagement of
reverse and greater lube flow.
New (for 1994) 4-pinion overdrive planet and input shaft assemblies replace older 3 and 4 pinion units
which tend to develop cracks in the carrier under heavy loads.
Center support update kit (for units built from 1989 through part of 1994) replaces wear-prone
bushing with a ball bearing and contains a new overdrive stub shaft.
Stronger overdrive clutch cylinder snap ring which will not dislodge.
Revised sun gear and rear case bushings (circa 1992 model year) provide longer wear life and better
Four pinion planet carriers (first used in 1992 model year)
New forward clutch friction plates with hardened internal splines cure "chatter" and "no-drive"
conditions in E4OD and some later C-6 transmissions.