Future Build? Perhaps.

**noreasonwhyy** · 07-22-2010

alright so i've been contemplating a build for my 97 gt.

scenario one - topswap, rebuilt 4t60 with shift kit and an adjustable vacuum modulator giving me considerably greater control over line pressures and shift points.

scenario two - l67/4t65 swap.

obviously the first scenario would be less expensive, yet i'm leaning toward the latter for reliability reasons. opinions?

**99prixgt** · 07-22-2010

since the 4t60 is garbage, i choose option 2

**noreasonwhyy** · 07-22-2010

yeah so i've heard and having my stock motor around would be a nice backup plan.

i think it'd be easiest to have the l67/32 on a stand while getting everything setup. rather than have my DD down for X amount of days, i could easily do the swap in a weekend.

**matt5112** · 07-22-2010

top swap + 4t65e?

**blueguy** · 07-23-2010

Originally Posted by matt5112

top swap + 4t65eHD

**matt5112** · 07-23-2010

Because the differential makes that much of a difference?

My buddy's brother keeps telling me that i'm going to blow my transmission up because its not the HD and that the HD is MORE than just a stronger yet still useless differential and a lower final drive ratio.

**ninnyGTP** · 07-23-2010

HD is over rated. non-HD trans is where it's at. Only thing worth a **** in the HD version is the differential. Everything else from the gearing to the convertor is garbage. SE is still on stock non-HD trans with 280k on it... Runs like a champ and takes the added power without a hiccup

**matt5112** · 07-23-2010

You do realize its the SAME right?

And that makes BOTH transmissions garbage right?

**noreasonwhyy** · 07-23-2010

Originally Posted by matt5112

top swap + 4t65e?

haha forgot about that option for a minute. good call.

Originally Posted by matt5112

You do realize its the SAME right?

And that makes BOTH transmissions garbage right?

i know this has been answered elsewhere but i want to clarify - exactly what are the differences in the 4t65e and the HD? are the housings the same? isn't the HD differential a bit longer?

**blueguy** · 07-23-2010

No...the Diff is just stronger. Both transmissions are identical minus the non-HD trans has 3.29 gearing...which is what you want.

**noreasonwhyy** · 07-23-2010

good to know blue.
now say i want to do a bit of extensive modding to this build, would it be easiest from a tuning standpoint to do it all at once then get a custom/dyno tune or little by little?