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FE Power Forums => FE Technical Forum => Topic started by: 67428GT500 on September 01, 2019, 01:05:04 AM

Title: C4/ Top Loader cross member height to frame rails. What to use for a TKO 600
Post by: 67428GT500 on September 01, 2019, 01:05:04 AM
Does anyone know which cross member would be best of their height relative to the floor brace?

                                                      -Keith
Title: Re: C4/ Top Loader cross member height to frame rails. What to use for a TKO 600
Post by: gregb on September 01, 2019, 09:44:03 AM
Neither of those will work with a TKO, the mount is farther back on the 5 speed.  You will need a custom piece, fortunately that's a popular swap and they are readily available. 
Title: Re: C4/ Top Loader cross member height to frame rails. What to use for a TKO 600
Post by: My427stang on September 02, 2019, 08:32:52 AM
I answered the guy on the other forum, but if this is a different question, here is some info

The tough part, if there is one, is measuring angle not knowing where it started if you already took it apart because you need to do some figuring.  What I do on Toploader conversions is measure to the floorboard at the output shaft before disassembly (driveshaft and yoke out) and then start there with shims when I put the TKO in, needless to say it's usually spot on unless I need to make room for the tranny.  Better said, it's no worse than before. 

FWIW, I haven't seen an aftermarket Mustang crossmember that hasn't hung the tranny too low.  I drove mine up 3/4 more than the crossmember to get back to stock angles, but that also required some floor work.  However, Bruce Couture at Modern Driveline sells machined cases now that let you drive the tranny into the tunnel, my guess is that he has raised the mounting pad on the crossmember or provided shims to get you there.  We should have one in hand over the next year, but I haven't seen his stuff yet

At the opposite end, If someone just trusts angles and runs it, of course u-joints can suffer, people talk about that all the time, but you may see some immediate feedback at the bottom of the fan when you tun the key too.  SBFs are different than FEs and it gets pretty tight at the bottom if too much angle


Title: Re: C4/ Top Loader cross member height to frame rails. What to use for a TKO 600
Post by: 67428GT500 on September 02, 2019, 08:30:24 PM
That is the kit I am purchasing. It is machined and drops into the stock location and requires no bell housing replacement.  They have even located the shifter into stock location.  He also gives a 10% discount for those of us who are veterans.
                                                                                                                   -Keith