I have a 1964 Chevelle convertible. Several years ago I put a 700-R4 in it, which has never shifted correctly. It slips, doesn’t work right with the carburetor, etc. I just want to switch it out. What would you recommend as a good replacement—a TH400 / TH350, GM 4L80E, or what? — D.E. Jeff
I recently purchased a’71 Camaro with a small-block and a 700R4 overdrive trans. The guy who I bought it from said the trans has a lockup converter and that everything worked great. But driving it now for a while, I don’t think the converter is really locking up. I have a buddy with a 700R4
I see where Summit Racing lists a TCI transmission that was originally a 4L80E – but they list it as a six-speed transmission. I’ve heard a little about this—did they add two more gears to the transmission? How is this different from the GM 6L80E transmission that is used in the Corvette or in the
You’ve got questions, we’ve got answers. We work with the Summit Racing tech department to help you tackle your auto-related conundrums. In this week’s Mailbag, we’re recommending a carburetor and gearing combo to combat an improperly shifting 700R-4 automatic transmission. Q: I have a 1986 ½-ton Chevrolet pickup with full time four-wheel drive. It has a 350 crate
Is it Necessary to Align the Bellhousing for a Transmission Swap? Q: I’m installing a new 5-speed transmission and bellhousing in my 1993 Mustang. A friend of mine asked me whether I aligned the bellhousing. All of my parts are new, so is it actually necessary to align the bellhousing? Yes—Bellhousing Alignment is Essential A:
Q: I recently replaced the 305 engine and TH-200 transmission in my 1985 Monte Carlo for a 350 with a mild cam and a TH-350 transmission. My question is about the tranny. It was in a friend’s strip car, and had about 15 passes on it before I got it. The transmission has some kind
When your hunt for automotive performance gains turns to upgrading your transmission and shifting performance, it’s important not to overlook the “brains of the transmission” — the valve body. In this edition of Carl’s Tech Talk video series from Summit Racing, tech expert Carl Pritts will walk you through the process of modifying your transmission’s valve body. Transmission
Transmission identification is a common issue among classic car enthusiasts. According to the Summit Racing technical department, it’s one of the most-asked-about topics when customers call for advice. We dedicated an entire post to the subject a couple years back, but the bottom line is you can identify common automatic transmissions by the shape and bolt pattern
Q: I have a Turbo 400 transmission with a 4,000-rpm stall converter and a transmission cooler. My trouble starts when the transmission temperature gets to about 210˚ F—the transmission starts blowing fluid out of the top vent tube. Even this hot, the trans doesn’t slip and shifts just like it does when it’s cool, whether
You’ve got questions. We’ve got the answers—the Summit Racing tech department tackles your automotive-related conundrums. This week, we’re looking at ways to fix a hard-shifting transmission. J.W. Niagara Falls, NY Q: I have discovered that the shifting characteristics of my TCI Turbo 350 Street Fighter transmission are not what I want for my daily driver. Specifically, downshifts at highway
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