When did the GM 700R4 become the 4L60?
In 1990, the 700R4 was redesignated as the 4L60 ( 4 -speeds, L ongitudinally positioned, 60 00 lbs. GVW). This was a change in name only with no significant mechanical changes associated. A good part of GM’s reasoning in developing the 700R was to allow more of their vehicles to meet ever stricter mileage and emissions requirements.
When did the GM TH700R4 Turbo 700 come out?
The TH700R4 is an automatic shift, four-speed overdrive, longitudinally positioned transmission. It is now considered to be one of the finest overdrive automatic transmissions ever produced. The Turbo 700 was introduced in 1982 as a response to fuel economy pressures, and to be phased in as the replacement for the TH350.
Can a GM 700R be used as a 2WD transmission?
This transmission makes an excellent conversion transmission due to its adaptability into most Jeeps. Both 2wd and 4wd versions of the 700R can be used equally well, and there are no inherent advantages to either one once you have installed our adapter assembly.
What kind of engine does a GMC pickup have?
This engine was designed as a direct replacement for 1987-1995 Chevy & GMC pickups, SUV’s, and van applications. These vehicles featured a 350 ci, 5.7 small block Chevy with TBI (throttle body injected) EFI system and swirl port heads.
What are the specs for a TBI crate engine?
4. The cam in the TBI engine is just plain AWFUL. Specs on Stock TBI cam is .050″ tappet lift (intake/exhaust) is 165/175; and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is .382/.402. I got those specs right off the Jegs website selling the new GM replacement TBI crate engines.
Can you change the throttle body on a 350 TBI?
Modify the throttle body. This one pretty cheap but does require removing the throttle body. UTIMATE MODS . Stock 42mm TBI units flow around 450cfm which if you look at http://www.carburetion.com/calc.asp a stock 350 even with a cam upgrade to increase the powerband to 5500 rpms isn’t going to use much if any more than that stock throttle body.
What kind of Head do I need for a 350 TBI?
Another good reasonably priced set of heads that will work nicely without special intakes on a TBI motor is a set of Summit Racing aluminum heads. Great flow number and stock TBI or aftermarket TBI intakes will bolt right on saving you some money. 50 state legal and better flow numbers than vortec heads.
What should the fuel pressure be on a 350 TBI?
From 370-440hp you need to bump the fuel pressure up on the 454 injectors to the 15-18psi to increase their flow rate to 100lb/hr.