That is very good news. By using our conversion adapter plate, you are able to replace your 1989 chain drive transfer case with a 1979-95 gear drive transfer case.
The chain drive transfer case you have now uses a planetary gear set to achieve it's gear reduction, whereas the gear drive transfer case uses a counter shaft to achieve it's gear reduction.
The problem with planetary gear reduction system, is that in order to increase it's gear reduction, progressively smaller components are required which diminishes the system's strength exponentially.
This is true to a counter shaft gear reduction type, however at a lesser rate. With the space and size restrictions of the Toyota transfer cases, a redesigned lower gear ratio chain drive unit will be considerably weaker than the gear drive unit of the same gear reduction.
For this exact reason, the after market of the chain drive Toyota transfer case is non existent.
Therefore the best way to reduce the final gear drive ratio of a Toyota truck equipped with a chain drive transfer case, is to replace it's chain drive transfer case with a 1979-95 gear drive transfer case.
The conversion adapter mentioned in the first sentence above, is a thin 1" thick billet aluminum plate that converts the bolt pattern of your transmission's tail housing to allow a gear drive transfer case to be mounted behind it.
Once the gear drive transfer case is mounted behind your V6 transmission, the sky is the limit: Your truck will be opened up to the wonderful Marlin Crawler world of after market parts including 4.70:1 low range gear replacements to multiple gear reduction transfer case systems.
What sort of plans do you have for your 4Runner? What types of terrain are you looking to tackle?
