JEGS
GM 700R4, 4L60, 4L60E Transmission Crossmember
555-640601
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G-Body Crossmembers
JEGS 555-640601 Transmission Crossmember Features:
- The double-hump design allows dual exhaust upgrades for your vehicle
- Black powder-coated steel for strength, great looks, and long life
- Must have upgrade for transmission swaps
Installation Notes:
- Some 1983 Hurst Oldsmobiles were originally equipped with a 2004R transmission and will not require this frame extension. If you are unsure, 1984 and later models will feature two mounting locations for the transmission cross member approximately 14 in. behind the front set of mounting holes.
- Crossmember is designed for 1978-1988 G-Bodys that were originally equipped with an Chevy small block engine.
- Does not fit Cutlass Supreme models or El Camino.
- Engine and transmission swaps may require some additional modifications & fitment of components. Hardware is not included.
FAQ
Is 4L60 and 700R4 the same transmission?
- Yes, the 4L60 and 700R4 are essentially the same transmission, differing mainly in nomenclature. The 700R4 was the original designation, while the 4L60 name was introduced later to reflect improvements and changes in the transmission. Both are four-speed automatic overdrive transmissions commonly used in GM vehicles.
Can you convert a 4L60E to a 700R4?
- Converting a 4L60E to a 700R4 is technically possible but involves significant modifications and compatibility considerations. The 4L60E is an electronically controlled transmission, while the 700R4 is mechanically controlled. Converting between them would require rewiring, mechanical alterations, and potentially sourcing additional parts. It's advisable to consult with a qualified mechanic or transmission specialist for guidance.
Can you put a 4L60 in place of a 4L60E?
- Swapping a 4L60 in place of a 4L60E may be feasible with the right modifications and compatible components. However, it's crucial to consider differences in electronic controls, wiring, and transmission functionality. Depending on the vehicle's setup and desired outcome, this swap may require extensive adjustments and could affect overall performance. Consulting with a knowledgeable technician or utilizing conversion kits designed for this purpose is recommended.
Is transmission crossmember important?
- Yes, a transmission crossmember is vital for proper support and alignment of the transmission in your vehicle. It helps distribute the weight of the transmission, maintains drivetrain alignment, and reduces stress on mounting points. The correct crossmember ensures structural integrity and prevents issues like vibration, driveline misalignment, and potential damage to transmission components. Explore reliable transmission crossmembers, including the G-Body 4l60E crossmember and G-Body 700R4 crossmember, available at JEGS.com.
Specifications:
Will this work on an 1987 caprice ls brougham with a 4l60e?
Will this work in a 84 regal ls swap with 4l60e?
Will this fit a 85 Monte Carlo SS with a 4L70-e transmission swap?
Will this or do you have one that fits a t56
Will this crossmember and a 4l80e frame extension work with a 4l80e by chance? Wanting to put a 4l80e in my 79 elcamino and use the 4l60e crossmember and frame extension
What is different that this won't fit an El Camino? Do you have a dual exhaust crossmember that does fit a 700R4 into an El Camino?
Will this fit an 81 monte carlo the vehicle came with a 3.8L v6 and th200, im swapping in a 5.3 ls with 4l60e, will this work
Will this fit a 4L60E?
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