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Ford Bronco Parts - Classic Vintage Early Bronco Parts

700R4 4 speed automatic – Transmission Guide

Tech article by admin and filed under - Automatic, Transmission

Tech article by Jon Hanna (Admin)

Automatic Trans Intro
• Gear Ratio Chart
• C4
• C6
• AODE & 4R70W
• 700R4
See also Manual Trans
Chevy 700R4 Transmission

700R4 Chevy 4 speed automatic with overdrive
1982-1993 Chevy 8 cyl cars and trucks. 1987 and newer models are preferred due to a redesign that corrected several problem areas.
Has a one-piece cast aluminum case and bell housing design. Look for a unique slope at the bottom of the bell housing. Case length of approximately 23.5″ and weighs 155-160 lbs.
Adapter required?
Since the 700R4 is a Chevy transmission a bell housing adapter, new flex plate and torque converter adapter must be used to bolt up to Ford engines. Likewise an adapter kit is required to mate to the Dana 20 transfer case which should include 2 adapters, a new output (main) shaft and spud shaft.
The gear range is one of the best available in an automatic transmission. The low 1st gear combined with an overdrive makes it a great choice for street and trail rigs. The 700R4 is a reliable and well known with a large aftermarket following. They’re fairly easy and inexpensive to come by.
Well, it is a Chevy! Early versions (pre-1987) had some design problems, which gave the 700R4 a bad name, and some still prefer not to use them. However, these have been around long enough that it’s not hard to find shops to build them properly.
Cost: (Approximate)
Transmission: $150-500 used and $800-1600 rebuilt
Adapter to engine: $400
Adapter to transfer case: $500-550
Drive Shaft Mods:
Total transmission is approximately 1.5″ longer requiring some drive shaft modifications
Bell housing:
The 700R4 does not bolt up to Ford engines. An adapter kit is required.
Modifications needed:
The transfer case is set back further requiring a larger hole in the floor and a new and/or modified cross member. An aftermarket transmission shifter or modification to your stock automatic shifter will be required. Transfer case to floor may be tight if you don’t have a body lift installed and the front drive shaft may be very close to the transmission pan depending on your lift. A smaller diameter front drive shaft or transmission pan modification may be required.

Manual Transmissions 1st 2nd 3rd 4th 5th
Bronco 3 spd (6 cyl) 3.41 1.86 1.00
Bronco 3 spd (8 cyl) 2.99 1.75 1.00
NP 435 6.69 3.34 1.79 1.00
T-18 6.32 3.09 1.69 1.00
Toploader (Close ratio) 2.32 1.69 1.29 1.00
Toploader (Wide ratio) 2.78 1.93 1.35 1.00
Toploader (Overdrive) 3.29 1.84 1.00 0.81
ZF 5.72 2.94 1.61 1.00 0.76
NV4500 (Dodge) 5.61 3.04 1.67 1.00 0.73
Automatic Transmissions 1st 2nd 3rd 4th 5th
Bronco C4 2.46 1.46 1.00
C6 2.46 1.46 1.00
AOD 2.40 1.47 1.00 .67
AOD w/ low gear set 2.84 1.55 1.00 .67
AODE/4R70W* 2.84 1.55 1.00 .67
700R4 3.06 1.62 1.00 .70

2 Responses to “700R4 4 speed automatic – Transmission Guide”

  1. Larry B Says:

    I would love to have the overdrive, over my 3 speed manual

  2. KCkaras Says:

    i need a transmission perferably a 700r4 for my 72 bronc any takers

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